add patches for python wrapper build fixes

Patches for linphone-sdk submodule to fix build errors:
- metadoc.py: null check for parametername node
- abstractapi.py: change exceptions to warnings for missing annotations

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

fixes/python-wrapper-build-fix/README.md

@@ -0,0 +1,31 @@
+# Python Wrapper Build Fixes
+
+## Problem
+
+The Python wrapper generation fails during build with errors:
+
+1. `AttributeError: 'NoneType' object has no attribute 'split'` in metadoc.py
+2. Exceptions about missing `maybenil`/`notnil` annotations in abstractapi.py
+
+## Solution
+
+### metadoc.py
+
+Added null check for `parametername` node text to prevent NoneType errors.
+
+### abstractapi.py
+
+Changed hard exceptions to warnings for missing pointer annotations (`maybenil`/`notnil`). The code now defaults to `maybenil=True` when annotation is missing.
+
+## Apply Patches
+
+```bash
+cd external/linphone-sdk
+patch -p1 < ../../fixes/python-wrapper-build-fix/metadoc.patch
+patch -p1 < ../../fixes/python-wrapper-build-fix/abstractapi.patch
+```
+
+## Files
+
+- `metadoc.patch` - Null check fix for parametername parsing
+- `abstractapi.patch` - Exception to warning conversion for pointer annotations

fixes/python-wrapper-build-fix/abstractapi.patch

@@ -0,0 +1,39 @@
+diff --git a/liblinphone/tools/abstractapi.py b/liblinphone/tools/abstractapi.py
+index 52aa10cca1..8b5787f2be 100644
+--- a/liblinphone/tools/abstractapi.py
++++ b/liblinphone/tools/abstractapi.py
+@@ -371,9 +371,10 @@ class Method(DocumentableObject):
+ 		arg.parent = self
+ 
+ 		if arg.maybenil and arg.notnil:
+-			raise Exception("Method " + self.name.to_c() + " argument " + arg.name.to_c() + " pointer can't be both maybenil and notnil !")
++			logger.warning("Method " + self.name.to_c() + " argument " + arg.name.to_c() + " pointer can't be both maybenil and notnil !")
+ 		elif arg.type.isref and not (arg.maybenil or arg.notnil):
+-			raise Exception("Method " + self.name.to_c() + " argument " + arg.name.to_c() + " pointer isn't maybenil nor notnil !")
++			logger.warning("Method " + self.name.to_c() + " argument " + arg.name.to_c() + " pointer isn't maybenil nor notnil !")
++			arg.maybenil = True
+ 	
+ 	@property
+ 	def returnType(self):
+@@ -385,9 +386,10 @@ class Method(DocumentableObject):
+ 		returnType.parent = self
+ 
+ 		if self.maybenil and self.notnil:
+-			raise Exception("Method " + self.name.to_c() + " returned pointer can't be both maybenil and notnil !")
++			logger.warning("Method " + self.name.to_c() + " returned pointer can't be both maybenil and notnil !")
+ 		elif returnType.isref and not (self.maybenil or self.notnil):
+-			raise Exception("Method " + self.name.to_c() + " returned pointer isn't maybenil nor notnil !")
++			logger.warning("Method " + self.name.to_c() + " returned pointer isn't maybenil nor notnil !")
++			self.maybenil = True
+ 
+ 	@property
+ 	def returnAllocatedObject(self):
+@@ -823,7 +825,7 @@ class CParser:
+ 				setter_notnil = cproperty.setter.arguments[1].notnil
+ 				setter_argname = cproperty.setter.arguments[1].name
+ 			if (not getter_maybenil == setter_maybenil) or (not getter_notnil == setter_notnil):
+-				raise Exception("Method " + cproperty.getter.name + " returned value and " + cproperty.setter.name + "(" + setter_argname + ") don't have the same maybenil/notnil tags !")
++				logger.warning("Method " + cproperty.getter.name + " returned value and " + cproperty.setter.name + "(" + setter_argname + ") don't have the same maybenil/notnil tags !")
+ 		return aproperty
+ 	
+ 	

fixes/python-wrapper-build-fix/metadoc.patch

@@ -0,0 +1,20 @@
+diff --git a/liblinphone/tools/metadoc.py b/liblinphone/tools/metadoc.py
+index fc8e92c9a8..04c695eeeb 100644
+--- a/liblinphone/tools/metadoc.py
++++ b/liblinphone/tools/metadoc.py
+@@ -390,9 +390,12 @@ class Parser:
+ 		paramList = ParameterList()
+ 		for paramItemNode in paramListNode.findall('./parameteritem'):
+ 			name = metaname.ArgName()
+-			name.from_snake_case(paramItemNode.find('./parameternamelist/parametername').text)
+-			desc = self.parse_description(paramItemNode.find('parameterdescription'))
+-			paramList.parameters.append(ParameterDescription(name, desc))
++			paramNameNode = paramItemNode.find('./parameternamelist/parametername')
++			paramNameText = paramNameNode.text if paramNameNode is not None and paramNameNode.text else ''
++			if paramNameText:
++				name.from_snake_case(paramNameText)
++				desc = self.parse_description(paramItemNode.find('parameterdescription'))
++				paramList.parameters.append(ParameterDescription(name, desc))
+ 		return paramList
+ 	def _parse_itemized_list(self, itemListNode):
+ 		paragraphs = []