fix crash when tracing with too small clones

diff --git a/src/dialogs/clonetiler.cpp b/src/dialogs/clonetiler.cpp
index e063c80544bebbc744445c76df8cba96b8ce5a67..130480608413469142ab004966ed618dfd29b3f7 100644 (file)
--- a/src/dialogs/clonetiler.cpp
+++ b/src/dialogs/clonetiler.cpp
@@ -786,12 +786,13 @@ clonetiler_trace_pick (NR::Rect box)
 
     /* Set up pixblock */
     guchar *px = g_new(guchar, 4 * width * height);
-    memset(px, 0x00, 4 * width * height);
 
     if (px == NULL) {
         return 0; // buffer is too big or too small, cannot pick, so return 0
     }
 
+    memset(px, 0x00, 4 * width * height);
+
     /* Render */
     NRPixBlock pb;
     nr_pixblock_setup_extern( &pb, NR_PIXBLOCK_MODE_R8G8B8A8N,