build: fix ENABLE_NLS preprocessor check.

Because ENABLE_NLS may be defined to 0 (manually, not through
autoconf) and it's semantically incorrect to only check whether it's
defined.

This is a correction to commit
661d603b65385f62f372acd2017e5af2e0f0cd50.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/main.c b/src/main.c
index 65285a0..a4047d7 100644
--- a/src/main.c
+++ b/src/main.c
@@ -197,7 +197,7 @@ int flex_main (int argc, char *argv[])
 /* Wrapper around flex_main, so flex_main can be built as a library. */
 int main (int argc, char *argv[])
 {
-#ifdef ENABLE_NLS
+#if defined(ENABLE_NLS) && ENABLE_NLS
 #if HAVE_LOCALE_H
 	setlocale (LC_MESSAGES, "");
         setlocale (LC_CTYPE, "");