removed XTestGrabControl. Doesn't really solve the problem of a bad param.

TODO

@@ -2,6 +2,7 @@ immediate:
 ----------
 
 x11vnc: clipboard, cursor, updates interruptible by input (doesn't work yet)
+.x11vnc: sometimes XTest fails (but doesn't with x0rfbserver)
 extra_bytes in rfbDrawCharWithClip.
 tested mouse buttons make copy rect, but text is not marked as mod.
 cursor drawing: set optional grain to mark bigger rectangles as drawn (else
@@ -28,7 +29,6 @@ internal HTTP tunnelling feature (needs a special GET target and a few
 done:
 -----
 
-.x11vnc: sometimes XTest fails (but doesn't with x0rfbserver)
 .DeferUpdateTime (timing problems!)
 .empty cursor sending doesn't work.
 .udp (need an rfbClientPtr udpClient in rfbScreen)

x11vnc.c

@@ -256,7 +256,7 @@ int main(int argc,char** argv)
 
   xscreen = DefaultScreen(dpy);
   window = RootWindow(dpy,xscreen);
-  XTestGrabControl(dpy,True);
+  //XTestGrabControl(dpy,True);
 
   init_keycodes();