BR3200749: Fix "use after close" file pointer

Cleanup routine might be called several times
so be ready for that.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/nasm.c b/nasm.c
index 7a63afb8..c0a105b0 100644
--- a/nasm.c
+++ b/nasm.c
@@ -2069,7 +2069,10 @@ static char *no_pp_getline(void)
 static void no_pp_cleanup(int pass)
 {
     (void)pass;                     /* placate GCC */
-    fclose(no_pp_fp);
+    if (no_pp_fp) {
+        fclose(no_pp_fp);
+        no_pp_fp = NULL;
+    }
 }
 
 static uint32_t get_cpu(char *value)