Capture read errors in evemu-device

Like the scan functions, evemu_device returns a non-positive number
on failure. Adjust logic to capture the read errors returning zero.

Signed-off-by: Henrik Rydberg <rydberg@bitmath.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/tools/evemu-device.c b/tools/evemu-device.c
index 6dbfb8b..26da7d9 100644
--- a/tools/evemu-device.c
+++ b/tools/evemu-device.c
@@ -126,7 +126,8 @@ int main(int argc, char *argv[])
                 fprintf(stderr, "error: could not open file\n");
                 return -1;
         }
-        if ((ret = evemu_device(fp))) {
+        ret = evemu_device(fp);
+        if (ret <= 0) {
                 fprintf(stderr, "error: could not create device: %d\n", ret);
                 return -1;
         }