don't leak f->name.

Reference: /n/sources/patch/maybe/freesubfont-leak
Date: Sun Feb 23 16:15:33 CET 2014
Signed-off-by: quanstro@quanstro.net

--- /sys/src/libdraw/freesubfont.c	Sun Feb 23 16:15:28 2014
+++ /sys/src/libdraw/freesubfont.c	Sun Feb 23 16:15:27 2014
@@ -11,6 +11,7 @@
 	if(f->ref > 0)
 		return;
 	uninstallsubfont(f);
+	free(f->name);
 	free(f->info);	/* note: f->info must have been malloc'ed! */
 	freeimage(f->bits);
 	free(f);