hw/nxagent/Window.c: Initialize tmp_mask and attributes.event_mask with NoEventMask.

Amends the following compiler warning: ``` Window.c: In function ‘nxagentSetTopLevelEventMask’: Window.c:3392:31: warning: ‘attributes.event_mask’ may be used uninitialized in this function [-Wmaybe-uninitialized] Mask tmp_mask = attributes.event_mask; ^ ```

hw/nxagent/Window.c: Initialize tmp_mask and attributes.event_mask with NoEventMask.
00059798 · Mike Gabriel · 7251ef49 · 00059798
Commit 00059798 authored Mar 21, 2016 by Mike Gabriel
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Window.c nx-X11/programs/Xserver/hw/nxagent/Window.c +1 -1

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--- a/nx-X11/programs/Xserver/hw/nxagent/Window.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/Window.c
@@ -3385,7 +3385,7 @@ void nxagentSetTopLevelEventMask(pWin)
  if (nxagentOption(Rootless) && nxagentWindowTopLevel(pWin))
  {
    /* Assume that the mask fits in int... broken on Big Endian 64bit systems. */
-    Mask tmp_mask = attributes.event_mask;
+    Mask tmp_mask = attributes.event_mask = NoEventMask;
    nxagentGetEventMask(pWin, &tmp_mask);
    attributes.event_mask = (int)tmp_mask;