Fix strspn warning with -Wconversion

[BZ #14083]
Fix warning when using strspn with -Wconversion:
$ gcc -Wconversion -O t.c
t.c: In function ‘main’:
t.c:8:7: warning: conversion to ‘long unsigned int’ from ‘int’ may change the sign of the result [-Wsign-conversion]

1 files changed, 9 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 80651f1e4b..99283e2f82 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+2012-05-09  Andreas Jaeger  <aj@suse.de>
+
+	[BZ #14083]
+	* string/bits/string2.h (strspn) [__GNUC_PREREQ(3, 2) &&
+	!_HAVE_STRING_ARCH_strspn]: Cast zero to size_t to avoid
+	-Wconversion warning.
+	(strspn) [!__GNUC_PREREQ(3, 2) && !_HAVE_STRING_ARCH_strspn]:
+	Likewise.
+
 2012-05-09  Joseph Myers  <joseph@codesourcery.com>
 
 	* conform/data/locale.h-data (NULL): Use macro-constant.  Require