Configure: Fix a typo in checking of backtrace()

diff --git a/configure.ac b/configure.ac
index 9e375762d1ef51448bf896e3977ab77bd59dc608..5514fb567078dc1176341edb4421990454998403 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -314,7 +314,7 @@ if test "$enable_debug" = yes ; then
     [
       AC_DEFINE([HAVE_EXECINFO_H], [1], [Define to 1 if you have the <execinfo.h> header file.])
       AC_SEARCH_LIBS([backtrace], [execinfo],
-       []
+       [],
        [AC_MSG_ERROR([Function backtrace not available.])]
       )
     ]