Debugger: Memorize results of pointer lookups

Change-Id: If3dfdd21ac0737af7ee205b376b57d6e58ff6f91
Reviewed-by: hjk <hjk121@nokiamail.com>

share/qtcreator/debugger/gdbbridge.py

@@ -891,7 +891,9 @@ class Dumper(DumperBase):
         return 4
 
     def ptrSize(self):
-        return self.lookupType('void*').sizeof
+        self.cachedPtrSize = self.lookupType('void*').sizeof
+        self.ptrSize = lambda: self.cachedPtrSize
+        return self.cachedPtrSize
 
     def createValue(self, address, referencedType):
         try: