Fix a NULL dereference crash on incorreclty loaded
FITS images.
Lubomir Rintel <lkundrak@v3.sk>
diff -urp siril-0.8/src/callbacks.c siril-0.8.fixed/src/callbacks.c
--- siril-0.8/src/callbacks.c 2006-05-27 18:58:50.000000000 +0200
+++ siril-0.8.fixed/src/callbacks.c 2009-04-07 15:51:05.994372980 +0200
@@ -604,6 +604,9 @@ gboolean redraw(int vport, int doremap){
case RED_VPORT:
case BLUE_VPORT:
case GREEN_VPORT:
+ if (!com.graybuf[vport])
+ break;
+
if (doremap==REMAP){
if(gfit.naxis==3){
remap(RED_VPORT);