Fix for spurious CHR$(255) from Scale
Was calling Window_GetWimpHandle as though a SWI number, when that define is actually a subreason of Toolbox_ObjectMiscOp. Fixes https://www.riscosopen.org/forum/forums/4/topics/16280
Was calling Window_GetWimpHandle as though a SWI number, when that define is actually a subreason of Toolbox_ObjectMiscOp. Fixes https://www.riscosopen.org/forum/forums/4/topics/16280