PaintMaskFloodMode is supposed to be an alias of eSelectOp. paint_intern.h now includes ED_select_utils.h and simply assigns the relevent members of eSelectOp to PaintMaskFloodMode's members.
PaintMaskFloodMode is supposed to be an alias of eSelectOp. paint_intern.h now includes ED_select_utils.h and simply assigns the relevent members of eSelectOp to PaintMaskFloodMode's members.