Add include/asterisk/utils.h file. Which includes the function

ast_strlen_zero, which should be used instead of strlen to check if a
string has length or doesn't have length.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@2868 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/include/asterisk/utils.h b/include/asterisk/utils.h
new file mode 100755 (executable)
index 0000000..18863e8
--- /dev/null
+++ b/include/asterisk/utils.h
@@ -0,0 +1,20 @@
+/*
+ * Asterisk -- A telephony toolkit for Linux.
+ *
+ * Utility functions
+ *
+ * Copyright (C) 2004, Digium
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License
+ */
+
+#ifndef _ASTERISK_UTIL_H
+#define _ASTERISK_UTIL_H
+
+static inline int ast_strlen_zero(const char *s)
+{
+       return (*s == '\0');
+}
+
+#endif