cmocka: Make teardown_testing() static.
diff --git a/src/cmocka.c b/src/cmocka.c
index 8f6a078..acef558 100755
--- a/src/cmocka.c
+++ b/src/cmocka.c
@@ -358,7 +358,7 @@
 }
 
 
-void teardown_testing(const char *test_name) {
+static void teardown_testing(const char *test_name) {
 	(void)test_name;
     list_free(&global_function_result_map_head, free_symbol_map_value,
               (void*)0);