fix for memory allocation of thumbs

rtengine/dcraw.cc

@@ -9197,15 +9197,21 @@ rtengine::Thumbnail* rtengine::Thumbnail::loadQuickFromRaw (const Glib::ustring&
     rml.ciffBase = ciff_base;
     rml.ciffLength = ciff_len;
 
-	char thumb_buffer[thumb_length];
+	char *thumb_buffer malloc(thumb_length+64); // malloc instead of on the stack.
+	if ( thumb_buffer == NULL )
+	{
+		printf("DCRAW: failed3\n");
+		return NULL;
+	}
 	fseek(ifp,thumb_offset,SEEK_SET);
 	fread(thumb_buffer,1,thumb_length,ifp);
 	fclose(ifp);
 
 	rtengine::Thumbnail* tpp = rtengine::Thumbnail::loadFromMemory(thumb_buffer,thumb_length,w,h,fixwh);
+	free(thumb_buffer);
 	if ( tpp == 0 )
 	{
-		printf("DCRAW: failed3\n");
+		printf("DCRAW: failed4\n");
 		return NULL;
 	}