More nib2gmodel problems on OS42

[Pete French]

Making all in gui/Model...
gmake[1]: Entering directory `/home/pete/gnustep/nib2gmodel/gui/Model'
/home/pete/gnustep/nib2gmodel//usr/local/System/Makefiles/rules.make:385: 
target `/home/pete/gnustep/nib2gmodel//usr/local/System/Makefiles/' given more 
than once in the same rule.

I suspect this is because the variable GNUSTEP_TARGET_DIR becomes equal
to '.' from common.make

ifeq ($(GNUSTEP_FLATTENED),)
  GNUSTEP_HOST_DIR = $(GNUSTEP_HOST_CPU)/$(GNUSTEP_HOST_OS)
  GNUSTEP_TARGET_DIR = $(GNUSTEP_TARGET_CPU)/$(GNUSTEP_TARGET_OS)
  GNUSTEP_HOST_LDIR = $(GNUSTEP_HOST_DIR)/$(LIBRARY_COMBO)
  GNUSTEP_TARGET_LDIR = $(GNUSTEP_TARGET_DIR)/$(LIBRARY_COMBO)   
else
  GNUSTEP_HOST_DIR = .
  GNUSTEP_TARGET_DIR = .
  GNUSTEP_HOST_LDIR = .
  GNUSTEP_TARGET_LDIR = .
endif

and thus the lines 383 and 385 in rules.make come to the same place

-bat.