[util] Mark var static

From clang -Weverything bot:

options.cc:39:3: warning: no previous extern declaration for non-static variable 'supported_font_funcs' [-Wmissing-variable-declarations]

diff --git a/util/options.cc b/util/options.cc
index 0ab16d6..2897ec8 100644 (file)
--- a/util/options.cc
+++ b/util/options.cc
@@ -33,7 +33,7 @@
 #include <hb-ot.h>
 #endif
 
-struct supported_font_funcs_t {
+static struct supported_font_funcs_t {
        char name[4];
        void (*func) (hb_font_t *);
 } supported_font_funcs[] =