[PATCH evemu 1/2] evemu-record.c: fix memory access in error path

[Martin Kepplinger]

In case, for example, the output file could not have been opened, it
is accessed anyways if it's zero, resulting in a segmentation fault.

So let's free resources in the out-path only if they have been allocated
before.

Signed-off-by: Martin Kepplinger <martink at posteo.de>
---
 tools/evemu-record.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/tools/evemu-record.c b/tools/evemu-record.c
index 0eaa31d..54c7f92 100644
--- a/tools/evemu-record.c
+++ b/tools/evemu-record.c
@@ -337,9 +337,13 @@ int main(int argc, char *argv[])
 
 	rc = 0;
 out:
-	free(device);
-	close(fd);
-	if (output != stdout) {
+	if (device)
+		free(device);
+
+	if (fd > 0)
+		close(fd);
+
+	if (output && output != stdout) {
 		fclose(output);
 		output = stdout;
 	}
-- 
2.11.0