base64-test: Remove posibility of returning restrcted exit codes

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

libavutil/base64.c

@@ -270,7 +270,10 @@ int main(int argc, char ** argv)
         }
     }
 
-    return error_count;
+    if (error_count)
+        printf("Error Count: %d.\n", error_count);
+
+    return !!error_count;
 }
 
 // LCOV_EXCL_STOP