contrib: gme: don't skip negative (fixes #14088)

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>
(cherry picked from commit e11d1337c0997bea2c6d256845012b47044bf88a)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

contrib/src/gme/rules.mak

@@ -14,6 +14,7 @@ game-music-emu: game-music-emu-$(GME_VERSION).tar.bz2 .sum-gme
 	$(UNPACK)
 	$(APPLY) $(SRC)/gme/gme-static.patch
 	$(APPLY) $(SRC)/gme/gme-quotes.patch
+	$(APPLY) $(SRC)/gme/skip-underrun.patch
 	$(MOVE)
 
 .gme: game-music-emu toolchain.cmake

contrib/src/gme/skip-underrun.patch

+--- a/gme/Fir_Resampler.cpp	2013-03-17 02:38:55.000000000 +0100
++++ b/gme/Fir_Resampler.cpp	2015-03-06 14:33:01.061577900 +0100
+@@ -188,6 +188,8 @@
+ {
+ 	int remain = write_pos - buf.begin();
+ 	int max_count = remain - width_ * stereo;
++	if ( max_count < 0 )
++		return 0;
+ 	if ( count > max_count )
+ 		count = max_count;
+