Add locks of updateMutex in rfbRedrawAfterHideCursor() and

rfbSetClientColourMap().  Up listen limit from 5 to 32.

libvncserver/cursor.c

@@ -693,10 +693,13 @@ void rfbRedrawAfterHideCursor(rfbClientPtr cl,sraRegionPtr updateRegion)
 	if(sraClipRect2(&x,&y,&x2,&y2,0,0,s->width,s->height)) {
 	    sraRegionPtr rect;
 	    rect = sraRgnCreateRect(x,y,x2,y2);
-	    if(updateRegion)
+	    if(updateRegion) {
 	    	sraRgnOr(updateRegion,rect);
-	    else
+	    } else {
+		    LOCK(cl->updateMutex);
 		    sraRgnOr(cl->modifiedRegion,rect);
+		    UNLOCK(cl->updateMutex);
+	    }
 	    sraRgnDestroy(rect);
 	}
     }

libvncserver/sockets.c

@@ -638,7 +638,7 @@ rfbListenOnTCPPort(int port,
 	closesocket(sock);
 	return -1;
     }
-    if (listen(sock, 5) < 0) {
+    if (listen(sock, 32) < 0) {
 	closesocket(sock);
 	return -1;
     }

libvncserver/translate.c

@@ -423,6 +423,7 @@ rfbSetClientColourMap(rfbClientPtr cl, int firstColour, int nColours)
     }
 
     if (cl->format.trueColour) {
+	LOCK(cl->updateMutex);
 	(*rfbInitColourMapSingleTableFns
 	    [BPP2OFFSET(cl->format.bitsPerPixel)]) (&cl->translateLookupTable,
 					     &cl->screen->serverFormat, &cl->format,&cl->screen->colourMap);
@@ -430,6 +431,7 @@ rfbSetClientColourMap(rfbClientPtr cl, int firstColour, int nColours)
 	sraRgnDestroy(cl->modifiedRegion);
 	cl->modifiedRegion =
 	  sraRgnCreateRect(0,0,cl->screen->width,cl->screen->height);
+	UNLOCK(cl->updateMutex);
 
 	return TRUE;
     }