gdbstub: kill a warning

Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5943 c046a42c-6fe2-441c-8c8c-71466251a162

gdbstub.c

@@ -1030,7 +1030,7 @@ static int memtox(char *buf, const char *mem, int len)
     return p - buf;
 }
 
-const char *get_feature_xml(const char *p, const char **newp)
+static const char *get_feature_xml(const char *p, const char **newp)
 {
     extern const char *const xml_builtin[][2];
     size_t len;