libselinux: audit2why: close fd on enomem

Potential file descriptor leak on this code path, need to close file
descriptor if out of memory.

Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by: Dan Walsh <dwalsh@redhat.com>

libselinux/src/audit2why.c

@@ -235,6 +235,7 @@ static int __policy_init(const char *init_path)
 	avc = calloc(sizeof(struct avc_t), 1);
 	if (!avc) {
 		PyErr_SetString( PyExc_MemoryError, "Out of memory\n");
+		fclose(fp);
 		return 1;
 	}