Return new expression in SpecializeOperations rule to let driver know we've modified the  tree
Return new expression in SpecializeOperations rule to let driver know we've modified the 
tree

bgarrels/zorba,cezarfx/zorba,28msec/zorba,cezarfx/zorba,bgarrels/zorba,cezarfx/zorba,bgarrels/zorba,28msec/zorba,28msec/zorba,bgarrels/zorba,cezarfx/zorba,cezarfx/zorba,28msec/zorba,28msec/zorba,28msec/zorba,cezarfx/zorba,cezarfx/zorba,bgarrels/zorba,28msec/zorba,bgarrels/zorba,cezarfx/zorba,28msec/zorba,bgarrels/zorba,cezarfx/zorba,28msec/zorba,bgarrels/zorba,cezarfx/zorba