Index: trunk/src/plug_io.c
===================================================================
--- trunk/src/plug_io.c	(revision 36475)
+++ trunk/src/plug_io.c	(revision 36476)
@@ -451,7 +451,7 @@
 
 static int pcb_write_buffer(FILE *f, pcb_buffer_t *buff, const char *fmt, rnd_bool subc_only, long subc_idx)
 {
-	int res/*, newfmt = 0*/;
+	int res = -1/*, newfmt = 0*/;
 	pcb_plug_io_t *p = pcb_io_find_writer(subc_only ? PCB_IOT_FOOTPRINT : PCB_IOT_BUFFER, fmt);
 
 	if (p != NULL) {