Correct the gamma with the proper destination resolution when resampling

code/renderer/tr_init.c

@@ -750,7 +750,7 @@ void R_ResampledScreenShot(const char* filename, int destwidth, int destheight)
 
  // gamma correct
  if ( glConfig.deviceSupportsGamma ) {
- R_GammaCorrect( buffer + 18, 128 * 128 * 3 );
+ R_GammaCorrect( buffer + 18, destheight * destwidth * 3 );
  }
 
  ri.FS_WriteFile( filename, buffer, destheight * destwidth * 3 + 18 );