Merge pull request #507 from olliwang/freetype

Fixes memory leaks of freetype.

src/fontstash.h

@@ -162,11 +162,19 @@ static FT_Library ftLibrary;
 int fons__tt_init(FONScontext *context)
 {
 	FT_Error ftError;
-        FONS_NOTUSED(context);
+	FONS_NOTUSED(context);
 	ftError = FT_Init_FreeType(&ftLibrary);
 	return ftError == 0;
 }
 
+int fons__tt_done(FONScontext *context)
+{
+	FT_Error ftError;
+	FONS_NOTUSED(context);
+	ftError = FT_Done_FreeType(ftLibrary);
+	return ftError == 0;
+}
+
 int fons__tt_loadFont(FONScontext *context, FONSttFontImpl *font, unsigned char *data, int dataSize)
 {
 	FT_Error ftError;
@@ -264,6 +272,11 @@ int fons__tt_init(FONScontext *context)
 	return 1;
 }
 
+int fons__tt_done(FONScontext *context)
+	FONS_NOTUSED(context);
+	return 1;
+}
+
 int fons__tt_loadFont(FONScontext *context, FONSttFontImpl *font, unsigned char *data, int dataSize)
 {
 	int stbError;
@@ -1630,6 +1643,7 @@ void fonsDeleteInternal(FONScontext* stash)
 	if (stash->texData) free(stash->texData);
 	if (stash->scratch) free(stash->scratch);
 	free(stash);
+	fons__tt_done(stash);
 }
 
 void fonsSetErrorCallback(FONScontext* stash, void (*callback)(void* uptr, int error, int val), void* uptr)