- '.lgf' could be the standard 'lemon graph format' extension.
- heap_test is fixed in order that 'make discheck' work.
- heap_test now checks whether the input file exists.

 BINARIES = error_test

 INCLUDEDIRS= -I. -I.. -I../.. -I../{marci,jacint,alpar,johanna,athos,akos} -I$(HOME)/boost

 include ../makefile

 CXXFLAGS += $(C)