Fixed all gcc 4 warnings in blenkernel. Found 2 potentially harmful

unintialized variables in the verse code, verse_session.c:451 and
verse_object_node.c:339, those are properly initialized now.

source/blender/blenkernel/intern/writeavi.c

@@ -191,7 +191,7 @@ void append_avi(int frame, int *pixels, int rectx, int recty)
 	/* note that libavi free's the buffer... stupid interface - zr */
 	rectot= MEM_mallocN(rectx*recty*sizeof(int), "rectot");
 	rt1= rectot;
-	rt2= pixels + (recty-1)*rectx;
+	rt2= (unsigned int*)pixels + (recty-1)*rectx;
 	/* flip y and convert to abgr */
 	for (y=0; y < recty; y++, rt1+= rectx, rt2-= rectx) {
 		memcpy (rt1, rt2, rectx*sizeof(int));