resolve a build problem on Debian stretch

jpcima · jpcima · commit 95927c4d8204 · 2019-07-11T02:23:36.000+02:00
diff --git a/thirdparty/fontstash/fontstash.h b/thirdparty/fontstash/fontstash.h
@@ -254,6 +254,7 @@ static int fons__tt_getGlyphKernAdvance(FONSttFontImpl *font, int glyph1, int gl
 #else
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <stddef.h>
 #define STB_TRUETYPE_IMPLEMENTATION
 #define STBTT_STATIC
