sdext/source/presenter/makefile.mk .IF/.ENDIF mismatch

I'm failing to build OOO330_m20.  It stops in sdtext with the message:

Entering /XXXXX/XXXXX/XXXXX/OOO330_m20/sdext/source/presenter

dmake:  makefile.mk:  line 297:  Error: -- Missing targets or attributes
in rule


The problem could be unmatched if/else/endif statements, there is
an overlap of L10N_framework and ENABLE_PRESENTER_SCREEN, although the
total IFs equals the total ENDIFs, see below.


$ egrep '(\.IF|\.ELSE|\.ENDIF)' sdext/source/presenter/makefile.mk
.IF "$(L10N_framework)"==""
.IF "$(ENABLE_PRESENTER_SCREEN)" == "NO"
.ELSE
.IF "$(GUI)" == "WIN" || "$(GUI)" == "WNT"
.ELSE
.ENDIF
.IF "$(WITH_LANG)"==""
.ELSE                   # "$(WITH_LANG)"==""
.ENDIF                  # "$(WITH_LANG)"==""
.ENDIF # L10N_framework
.IF "$(L10N_framework)"==""
.IF "$(OS)$(CPU)"=="WNTI"
.IF "$(COM)"=="GCC"
.ELSE
        .IF "$(PACKMS)"!=""
                .IF "$(CCNUMVER)" <= "001399999999"
                .ELSE
                        .IF "$(CCNUMVER)" <= "001499999999"
                        .ELSE
                        .ENDIF
            .ENDIF
        .ELSE        # "$(PACKMS)"!=""
                .IF "$(CCNUMVER)" <= "001399999999"
                .ELSE
                        .IF "$(CCNUMVER)" <= "001499999999"
                        .ELSE
                        .ENDIF
            .ENDIF
        .ENDIF         # "$(PACKMS)"!=""
.ENDIF  #"$(COM)"=="GCC"
.ENDIF
.IF "$(GUI)" == "WIN" || "$(GUI)" == "WNT"
.ELSE
.ENDIF
.IF "$(LAST_WITH_LANG)"!="$(WITH_LANG)"
.ENDIF                  # "$(LAST_WITH_LANG)"!="$(WITH_LANG)"
.ENDIF # "$(ENABLE_PRESENTER_SCREEN)" != "NO"
.ELSE
.ENDIF # L10N_framework

$ grep '\.IF' sdext/source/presenter/makefile.mk | wc -l
      14
$ grep '\.ENDIF' sdext/source/presenter/makefile.mk | wc -l
      14


James.