winemac: Hide cursor when first requested even if we don't know it's over a window.

The tracking of whether it is over a window or not is only updated when the
mouse moves.  If a window was created or moved under it, then the state can be
stale.  That caused us to defer hiding the cursor until the mouse was moved.
This happens at the start of games pretty often.

dlls/winemac.drv/cocoa_app.m

@@ -787,9 +787,9 @@ - (BOOL) areDisplaysCaptured
         return ([originalDisplayModes count] > 0 || displaysCapturedForFullscreen);
     }
 
-    - (void) updateCursor
+    - (void) updateCursor:(BOOL)force
     {
-        if (lastTargetWindow)
+        if (force || lastTargetWindow)
         {
             if (clientWantsCursorHidden && !cursorHidden)
             {
@@ -829,7 +829,7 @@ - (void) hideCursor
         if (!clientWantsCursorHidden)
         {
             clientWantsCursorHidden = TRUE;
-            [self updateCursor];
+            [self updateCursor:TRUE];
         }
     }
 
@@ -838,7 +838,7 @@ - (void) unhideCursor
         if (clientWantsCursorHidden)
         {
             clientWantsCursorHidden = FALSE;
-            [self updateCursor];
+            [self updateCursor:FALSE];
         }
     }
 
@@ -849,7 +849,7 @@ - (void) setCursor:(NSCursor*)newCursor
             [cursor release];
             cursor = [newCursor retain];
             cursorIsCurrent = FALSE;
-            [self updateCursor];
+            [self updateCursor:FALSE];
         }
     }
 
@@ -1516,7 +1516,7 @@ - (void) handleMouseMove:(NSEvent*)anEvent
         else
             lastTargetWindow = nil;
 
-        [self updateCursor];
+        [self updateCursor:FALSE];
     }
 
     - (void) handleMouseButton:(NSEvent*)theEvent