Uninitialized variable compiler warnings on Linux

lib/layout/layblock.c

@@ -1855,10 +1855,10 @@ lo_RestoreLayerExitFn(void *myclosure,
 	lo_RestoreLayerClosure *closure = (lo_RestoreLayerClosure *)myclosure;
 	MWContext *context = closure->context;
 	lo_DocState *state = closure->state;
-	lo_TopState *top_state;
+	lo_TopState *top_state = NULL;
 	int32 doc_id = closure->doc_id;
 	PRBool flushp = (PRBool)(param->src == NULL);
-	LO_Element *blocking_element;
+	LO_Element *blocking_element=NULL;
 
 	if (doc_id == XP_DOCID(context)) {
 		top_state = state->top_state;

lib/layout/layform.c

@@ -104,7 +104,7 @@ lo_return_next_form_element(MWContext *context,
 	lo_FormData *form_list;
 	lo_FormData *prev_form_list=NULL;
 	LO_Element **ele_list;
-	LO_FormElementStruct *form_ele;
+	LO_FormElementStruct *form_ele=NULL;
 
     /*
      * Get the unique document ID, and retreive this