Compare function pointers against 0 rather than nil.
diff --git a/src/libdraw/ml-lsetrefresh.c b/src/libdraw/ml-lsetrefresh.c
index 17d04cb..526bd66 100644
--- a/src/libdraw/ml-lsetrefresh.c
+++ b/src/libdraw/ml-lsetrefresh.c
@@ -10,13 +10,13 @@
Memlayer *l;
l = i->layer;
- if(l->refreshfn!=nil && fn!=nil){ /* just change functions */
+ if(l->refreshfn!=0 && fn!=0){ /* just change functions */
l->refreshfn = fn;
l->refreshptr = ptr;
return 1;
}
- if(l->refreshfn == nil){ /* is using backup image; just free it */
+ if(l->refreshfn == 0){ /* is using backup image; just free it */
freememimage(l->save);
l->save = nil;
l->refreshfn = fn;
diff --git a/src/libdraw/ml-unload.c b/src/libdraw/ml-unload.c
index 23a8b29..b953411 100644
--- a/src/libdraw/ml-unload.c
+++ b/src/libdraw/ml-unload.c
@@ -35,7 +35,7 @@
* src is an obscured layer or data is unaligned
*/
if(dl->save && dx==0){
- if(dl->refreshfn != nil)
+ if(dl->refreshfn != 0)
return -1; /* can't unload window if it's not Refbackup */
if(n > 0)
memlhide(src, r);
