winwin_mouse_wheel_down read mouse wheel up event. and winwin_mouse_wheel_up not reading (always return 0).

Maybe related, winwin_mouse_wheel_get_delta_y always returns a positive value.

Hello, this too should be fixed in 1.0.1 - this was two separate issues:

• The raw scroll delta was being extracted incorrectly and thus negative deltas would appear as big positive deltas
• I was too quick to add delta_x/y functions and marked them as returning a bool instead of a number