Cleanup of OS X cursor fixes.

Closes #334.
Fixes #254.

README.md

@@ -82,6 +82,7 @@ GLFW bundles a number of dependencies in the `deps/` directory.
  - [Cocoa] Bugfix: Modifier key events were lost if the corresponding modifier
                    bit field was unchanged
  - [Cocoa] Bugfix: Joystick enumeration took hundreds of ms on some systems
+ - [Cocoa] Bugfix: The cursor was hidden when the user resized a GLFW window
  - [Win32] Enabled generation of pkg-config file for MinGW
  - [Win32] Bugfix: Failure to load winmm or its functions was not reported to
                    the error callback

src/cocoa_window.m

@@ -58,11 +58,10 @@ static NSCursor* getModeCursor(_GLFWwindow* window)
 //
 static void updateModeCursor(_GLFWwindow* window)
 {
-    // This is required for the cursor to update if cursor is inside the window
-    NSCursor* cursor = getModeCursor(window);
-    [cursor set];
+    // This is required for the cursor to update if it's inside the window
+    [getModeCursor(window) set];
 
-    // This is required for the cursor to update if cursor is outside the window
+    // This is required for the cursor to update if it's outside the window
     [window->ns.object invalidateCursorRectsForView:window->ns.view];
 }
 
@@ -687,9 +686,7 @@ static int translateKey(unsigned int key)
 
 - (void)resetCursorRects
 {
-    NSCursor* cursor = getModeCursor(window);
-
-    [self addCursorRect:[self bounds] cursor:cursor];
+    [self addCursorRect:[self bounds] cursor:getModeCursor(window)];
 }
 
 - (NSDragOperation)draggingEntered:(id <NSDraggingInfo>)sender