Avoid including dep rules if the previous makefile had an empty dep set,
because -include can't tolerate zero include files.

Modified: trunk/reactos/tools/depend.mk

--- trunk/reactos/tools/depend.mk	2004-12-31 19:38:40 UTC (rev 12659)
+++ trunk/reactos/tools/depend.mk	2004-12-31 19:38:47 UTC (rev 12660)
@@ -22,8 +22,10 @@

 DEP_FILES := $(join $(dir $(DEP_FILTERED)), $(addprefix ., $(notdir $(DEP_FILTERED))))
  
 ifneq ($(MAKECMDGOALS),clean)

+ifneq ($(DEP_FILES),)

 -include $(DEP_FILES)
 endif

+endif

 
 ifeq ($(SEP),\)
 DEPENDS_PATH := $(subst /,\,$(PATH_TO_TOP))\tools