diff options
Diffstat (limited to 'Xi')
| -rw-r--r-- | Xi/xiquerydevice.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/Xi/xiquerydevice.c b/Xi/xiquerydevice.c index 435868de2..47ab688fd 100644 --- a/Xi/xiquerydevice.c +++ b/Xi/xiquerydevice.c @@ -247,6 +247,9 @@ ListButtonInfo(DeviceIntPtr dev, xXIButtonInfo* info, Bool reportState) int mask_len; int i; + if (!dev || !dev->button) + return 0; + mask_len = bytes_to_int32(bits_to_bytes(dev->button->numButtons)); info->type = ButtonClass; @@ -259,7 +262,7 @@ ListButtonInfo(DeviceIntPtr dev, xXIButtonInfo* info, Bool reportState) memset(bits, 0, mask_len * 4); if (reportState) - for (i = 0; dev && dev->button && i < dev->button->numButtons; i++) + for (i = 0; i < dev->button->numButtons; i++) if (BitIsOn(dev->button->down, i)) SetBit(bits, i); |