move polkit check authorization in one function

util/alpm-util.h

@@ -1,5 +1,5 @@
-#ifndef ALPM_VALA_H
-#define ALPM_VALA_H
+#ifndef ALPM_UTIL_H
+#define ALPM_UTIL_H
 
 #include <alpm.h>
 
@@ -20,4 +20,4 @@ void* alpm_list_iterator_next_value (alpm_list_iterator_t *iter);
 alpm_pkg_t* alpm_pkg_load_file (alpm_handle_t *handle, const char *filename, int full, alpm_siglevel_t level);
 alpm_list_t* alpm_pkg_get_files_list (alpm_pkg_t* pkg);
 
-#endif //!ALPM_VALA_H
+#endif //!ALPM_UTIL_H