[PATCH] configure: make pattern for m4_pattern_forbid more strict

[Julien Cristau]

Without this, configure spits out
../configure: line 15460: ac_fn_c_check_member: command not found
---
 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/configure.ac b/configure.ac
index 46421fd..456ef1a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -642,7 +642,7 @@ dnl If you're seeing an error here, be sure you installed the lib/xtrans module
 dnl first and if it's not in the default location, that you set the ACLOCAL
 dnl environment variable to find it, such as:
 dnl	ACLOCAL="aclocal -I ${PREFIX}/share/aclocal"
-m4_pattern_forbid(XTRANS_CONNECTION_FLAGS)
+m4_pattern_forbid([^XTRANS_CONNECTION_FLAGS$])
 
 # Transport selection macro from xtrans.m4
 XTRANS_CONNECTION_FLAGS
-- 
1.6.4.3