Add a function to calculate the length of a NULL-terminated string array.

Add a function to calculate the length of a NULL-terminated string array.

Thu Sep  9 00:10:40 2004  Matthias Clasen  <maclas@gmx.de>

	* glib/gstrfuncs.h:
	* glib/gstrfuncs.c (g_strv_length): Add a function to
	calculate the length of a NULL-terminated string
	array.  (#150455, Tim-Philipp Müller)

	* tests/strfunc-test.c (main): Add a test for g_strv_length().