Changed the option to select the generation of a C++ scanner to the backward compatible -+.

wmake/rules/General/flex++

 .SUFFIXES: .L
 
-Ltoo = flex --c++ -f $$SOURCE ; mv lex.yy.cc $*.C ; $(CC) $(c++FLAGS) -c $*.C -o $@
+Ltoo = flex -+ -f $$SOURCE ; mv lex.yy.cc $*.C ; $(CC) $(c++FLAGS) -c $*.C -o $@
 
 .L.dep:
 	$(MAKE_DEP)