SVN commit 891005 by arnorehn:

* Check for return values being null and if so, don't alloc a GCHandle to it.
  Fixes crashes when a virtual method returned null. Thanks to Eric Butler for
  reporting the bug.

CCMAIL: kde-bindings@kde.org
CCMAIL: eric@extremeboredom.net



 M  +6 -0      ChangeLog  
 M  +6 -2      src/SmokeInvocation.cs  
 M  +2 -2      src/SmokeMarshallers.cs  


--- trunk/KDE/kdebindings/csharp/qyoto/ChangeLog #891004:891005
@@ -1,3 +1,9 @@
+2008-11-30  Arno Rehn  <arno@arnorehn.de>
+
+	* Check for return values being null and if so, don't alloc a GCHandle to it.
+	  Fixes crashes when a virtual method returned null. Thanks to Eric Butler for
+	  reporting the bug.
+
 2008-11-28  Richard Dale  <richard.j.dale@gmail.com>
 	* Add missing implicit QVariant constructors for QDate and QTime
 
--- trunk/KDE/kdebindings/csharp/qyoto/src/SmokeInvocation.cs #891004:891005
@@ -246,6 +246,8 @@
 #else
 					stackPtr[0].s_class = (IntPtr) GCHandle.Alloc(returnValue);
 #endif
+				} else if (returnValue == null) {
+					stackPtr[0].s_class = IntPtr.Zero;
 				} else {
 #if DEBUG
 					stackPtr[0].s_class = (IntPtr) DebugGCHandle.Alloc(returnValue);
@@ -356,6 +358,8 @@
 #else
 					retval[0].s_class = (IntPtr) GCHandle.Alloc(returnValue);
 #endif
+				} else if (returnValue == null) {
+					retval[0].s_class = IntPtr.Zero;
 				} else {
 #if DEBUG	
 					retval[0].s_class = (IntPtr) DebugGCHandle.Alloc(returnValue);
@@ -546,7 +550,7 @@
 			for (int i = 0, k = 1; i < args.Length; i += 2, k++) {
 				if (args[i+1] == null) {
 					unsafe {
-						stack[k].s_class = (IntPtr) 0;
+						stack[k].s_class = IntPtr.Zero;
 					}
 				} else if (args[i] == typeof(int) || ((Type) args[i]).IsEnum) {
 					stack[k].s_int = (int) args[i+1];
@@ -628,7 +632,7 @@
 					} else if (returnType == typeof(char)) {
 						returnValue = (char) stack[0].s_char;
 					} else {
-						if (((IntPtr) stack[0].s_class) == (IntPtr) 0) {
+						if (((IntPtr) stack[0].s_class) == IntPtr.Zero) {
 							returnValue = null;
 						} else {
 							returnValue = ((GCHandle) stack[0].s_class).Target;
--- trunk/KDE/kdebindings/csharp/qyoto/src/SmokeMarshallers.cs #891004:891005
@@ -252,8 +252,8 @@
 		}
 		
 		public static IntPtr GetSmokeObject(IntPtr instancePtr) {
-			if (((int) instancePtr) == 0) {
-				return (IntPtr) 0;
+			if (instancePtr == IntPtr.Zero) {
+				return IntPtr.Zero;
 			}
 
 			Object instance = ((GCHandle) instancePtr).Target;