basebmap: 5e4a7a95 missed COM check

Change-Id: I6850d69089c4d0db06a22e14888f089406980c2c

basebmp/Library_basebmp.mk

@@ -33,11 +33,13 @@ $(eval $(call gb_Library_add_defs,basebmp,\
 # Fatal Error C1128: number of sections exceeded object file
 # format limit : compile with /bigobj
 #
+ifeq ($(COM),MSC)
 ifeq ($(CPUNAME),X86_64)
 $(eval $(call gb_Library_add_cxxflags,basebmp, \
     -bigobj \
 ))
 endif
+endif
 
 $(eval $(call gb_Library_add_exception_objects,basebmp,\
 	basebmp/source/bitmapdevice \