- Removed the 'fb_width_from_pitch' variable and replaced its usage with 'sys_framebuffer_pidth' to standardize the handling of framebuffer width-from-pitch across the codebase.
- Updated references to 'fb_width_from_pitch' in display and screen update functions to use 'sys_framebuffer_pidth', ensuring consistent calculations.
- Replaced 'sys_framebuffer_pitch / (sys_framebuffer_bpp / 8)' with 'sys_framebuffer_pidth' to avoid redundant calculations and improve code readability.
- Fixed framebuffer calculations in 'GrCalcScreenUpdates', 'GrUpdateScreen32', and related functions to use the correct framebuffer width-from-pitch value.
- Corrected and simplified screen update logic in 'GrZoomInScreen' and 'GrUpdateScreen'.
- Corrected loop bounds in 'GrZoomInScreen' to use 'GR_HEIGHT' and 'GR_WIDTH' constants instead of dynamic values from 'gr.dc2'.
- Updated 'src' offset calculations to use 'GR_WIDTH' instead of 'gr.dc2->width_internal'.
- Simplified 'GrUpdateScreen32' to use fixed 'GR_HEIGHT' and 'GR_WIDTH' values for screen updates, removing unnecessary calculations and size adjustments based on 'gr.dc2' and 'gr.zoomed_dc'.
