Fix typo in getpwname detection

diff --git a/helpers/basic_auth/getpwnam/required.m4 b/helpers/basic_auth/getpwnam/required.m4
index 581803c8b57605166490b276f79a0782f7091fac..61fbf8461aadf644f1cddc760cf2933908852ac0 100755 (executable)
--- a/helpers/basic_auth/getpwnam/required.m4
+++ b/helpers/basic_auth/getpwnam/required.m4
@@ -6,7 +6,7 @@ AC_CHECK_HEADERS([pwd.h],[
   SQUID_STATE_ROLLBACK(getpwnam_helper)
 
   # unconditionally requires crypt(3), for now
-  if test "x$cv_ac_func_crypt" != "x"; then
+  if test "x$ac_cv_func_crypt" != "x"; then
     AC_CHECK_HEADERS(unistd.h crypt.h shadow.h)
 
     BUILD_HELPER="getpwnam"