libvgl: do not initialize static storage.

The pointer value was being initialized to 0. While it would
have been better to use NULL here, it is static storage so
there is no need to do so.

lib/libvgl/text.c

@@ -33,7 +33,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/fbio.h>
 #include "vgl.h"
 
-static VGLText		*VGLTextFont = 0;
+static VGLText		*VGLTextFont;
 
 extern byte VGLFont[];