configure: Fix compilation on Windows: MinGW unistd.h does not define NULL

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@32295 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 5 insertions, 1 deletions

diff --git a/configure b/configure
index b68bbd8cf0..fbfb85cf76 100755
--- a/configure
+++ b/configure
@@ -3603,7 +3603,11 @@ echocheck "swab()"
 cat > $TMPC << EOF
 #define _XOPEN_SOURCE 600
 #include <unistd.h>
-int main(void) { swab(NULL, NULL, 0); return 0; }
+int main(void) {
+    int a = 0, b = 0;
+    swab(&a, &b, 0);
+    return 0;
+}
 EOF
 _swab=no
 cc_check && _swab=yes