eliminats warnings del codi original tocant lo menos posible

source/core/jail/jdraw8.cpp

@@ -4,7 +4,10 @@
 
 #include "core/jail/jfile.hpp"
 #include "core/system/director.hpp"
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wunused-but-set-variable"
 #include "external/gif.h"
+#pragma clang diagnostic pop
 
 JD8_Surface screen = NULL;
 JD8_Palette main_palette = NULL;