[BOX32][WRAPPER] Fix XRRGetPanning shrinking wrong variable

[devarajabc]

Lines 67-68 were operating on res (XRRScreenResources* input) instead of ret (XRRPanning* return value), corrupting the input struct instead of shrinking the returned panning data.
it should be like this:

  32-bit app calls XRRGetPanning(dpy, res_32, crtc)                                                                                                                                                       
          │                                                                  
          ▼
  my32_XRRGetPanning:
    1. enlarge res (32-bit → 64-bit)     ← convert input for native call
    2. call native XRRGetPanning(dpy, res_64, crtc)
    3. shrink res (64-bit → 32-bit)      ← restore input to 32-bit form
    4. shrink ret (64-bit → 32-bit)      ← convert output for 32-bit caller
    5. return ret_32
          │
          ▼
  32-bit app gets back XRRPanning* in 32-bit layout