strnlen: export its VLC pendant properly and check its existance in cc.c....

strnlen: export its VLC pendant properly and check its existance in cc.c. Fixes the compilation onDarwin

include/vlc_common.h

@@ -824,6 +824,7 @@ VLC_EXPORT( size_t, vlc_strlcpy, ( char *, const char *, size_t ) );
 VLC_EXPORT( double, vlc_atof, ( const char *nptr ) );
 VLC_EXPORT( int64_t, vlc_atoll, ( const char *nptr ) );
 VLC_EXPORT( int64_t, vlc_strtoll, ( const char *nptr, char **endptr, int base ) );
+VLC_EXPORT( size_t, vlc_strnlen, ( const char *, size_t ) );
 
 #if defined(SYS_BEOS) \
  || (defined (__FreeBSD__) && (__FreeBSD__ < 5))

modules/codec/cc.c

@@ -51,6 +51,10 @@
 #include <errno.h>
 #include <string.h>
 
+#if !defined( strnlen )
+#define strnlen vlc_strnlen
+#endif
+
 /*****************************************************************************
  * Module descriptor.
  *****************************************************************************/