Build: Fix underquoted AC_LANG_SOURCE.

It made no practical difference in this case.

diff --git a/configure.ac b/configure.ac
index 83d28b852eab5e64e64f8e63aa4d6953c7caeb56..d83b148a44f32bac3c6d2bd988389e2ef83a0287 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -1130,7 +1130,7 @@ AS_IF([test "$GCC" = yes], [
                OLD_CFLAGS="$CFLAGS"
                CFLAGS="$CFLAGS $NEW_FLAG -Werror"
                AC_COMPILE_IFELSE([AC_LANG_SOURCE(
-                               [void foo(void); void foo(void) { }])], [
+                               [[void foo(void); void foo(void) { }]])], [
                        AM_CFLAGS="$AM_CFLAGS $NEW_FLAG"
                        AC_MSG_RESULT([yes])
                ], [