checkseapp: declare internal function as static

(cherry picked from commit 25528cf4)

Change-Id: Ic4dc59650ca849b950cb145fedafdf4fc250f009
Signed-off-by: William Roberts <william.c.roberts@intel.com>

tools/check_seapp.c

@@ -306,7 +306,7 @@ log_msg(FILE *out, const char *prefix, const char *fmt, ...) {
  * 	statically to this executable and LINK_SEPOL_STATIC is not
  * 	defined.
  */
-int check_type(sepol_policydb_t *db, char *type) {
+static int check_type(sepol_policydb_t *db, char *type) {
 
 	int rc = 1;
 #if defined(LINK_SEPOL_STATIC)