xmoto: disable sdl test

Formula/xmoto.rb

@@ -24,11 +24,15 @@ class Xmoto < Formula
   def install
     # The ENV.x11 picks up libpng and sets CFLAGS and LDFLAGS
     ENV.x11
-    system "./configure", "--prefix=#{prefix}", "--with-internal-xdg=1", "--with-apple-opengl-framework"
+    system "./configure", "--prefix=#{prefix}",
+                          "--disable-sdltest",
+                          "--with-internal-xdg=1",
+                          "--with-apple-opengl-framework"
     system "make install"
   end
 end
 
+
 __END__
 diff --git a/src/image/tim_png.cpp b/src/image/tim_png.cpp
 index 75fd545..a1d1cf6 100644
@@ -40,4 +44,4 @@ index 75fd545..a1d1cf6 100644
  #include <string.h>
 +#include <zlib.h>
  #include "tim.h"
- #include "png.h"
+ #include "png.h"