Clarify cursor position variable names

src/cocoa_platform.h

@@ -78,7 +78,7 @@ typedef struct _GLFWwindowNS
     // The total sum of the distances the cursor has been warped
     // since the last cursor motion event was processed
     // This is kept to counteract Cocoa doing the same internally
-    double          warpDeltaX, warpDeltaY;
+    double          cursorWarpDeltaX, cursorWarpDeltaY;
 
 } _GLFWwindowNS;