Fix bool LPE.
Boolean LPE has a wrong way to transform operand, selecting it when transform.
To fis it I call always to the existing function to inform all LPE when a transform is done.
By default all LPE are marked to ignore if the LPE previously ignore it, except in bool LPE where we use it to transform operand.
Fixed issue #772 (closed).
Fixed issue #1076 (closed).
Fixed issue #1148 (closed).
Edited by Jabier Arraiza