Fix memory leak in FindFontSet

Valgrind results before:

  definitely lost: 800 bytes in 23 blocks
  indirectly lost: 872 bytes in 6 blocks
    possibly lost: 0 bytes in 0 blocks
  still reachable: 991,316 bytes in 1,795 blocks
       suppressed: 0 bytes in 0 blocks

Valgrind results after:

  definitely lost: 200 bytes in 17 blocks
  indirectly lost: 0 bytes in 0 blocks
    possibly lost: 0 bytes in 0 blocks
  still reachable: 918,812 bytes in 994 blocks
       suppressed: 0 bytes in 0 blocks

Signed-off-by: Tim Wiederhake <twied@gmx.net>
Part-of: <https://gitlab.freedesktop.org/xorg/app/twm/-/merge_requests/29>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/util.h b/src/util.h
index 6adeed9..a7ded89 100644
--- a/src/util.h
+++ b/src/util.h
@@ -77,6 +77,7 @@ extern void LocateStandardColormaps(void);
 extern void GetColor(int kind, Pixel *what, const char *name);
 extern void GetColorValue(int kind, XColor *what, const char *name);
 extern void GetFont(MyFont *font);
+extern void DestroyFont(MyFont *font);
 extern int MyFont_TextWidth(MyFont *font, const char *string, int len);
 extern void MyFont_DrawImageString(Display *dpy, Drawable d, MyFont *font,
                                    GC gc, int x, int y, const char *string,