fix for fix [#24344] crash on adding new image when composite is open and there is no Nodetree

also use const prefix in solidify modifier where possible.

source/blender/blenkernel/intern/node.c

@@ -1803,7 +1803,7 @@ int NodeTagIDChanged(bNodeTree *ntree, ID *id)
 {
 	int change = FALSE;
 
-	if(id==NULL)
+	if(ELEM(NULL, id, ntree))
 		return change;
 	
 	if(ntree->type==NTREE_COMPOSIT) {