Index: trunk/psModules/src/objects/pmSource.c
===================================================================
--- trunk/psModules/src/objects/pmSource.c	(revision 32695)
+++ trunk/psModules/src/objects/pmSource.c	(revision 33690)
@@ -160,4 +160,5 @@
     source->parent = NULL;
     source->imageID = -1;
+    source->nFrames = 0;
 
     psMemSetDeallocator(source, (psFreeFunc) sourceFree);