Use perror to report errors in system functions.
Use perror to report errors in system functions.

svn path=/trunk/StrategoXT/; revision=7108

metaborg/strategoxt,Apanatshka/strategoxt,Apanatshka/strategoxt,lichtemo/strategoxt,lichtemo/strategoxt,lichtemo/strategoxt,Apanatshka/strategoxt,metaborg/strategoxt,metaborg/strategoxt,metaborg/strategoxt,lichtemo/strategoxt,Apanatshka/strategoxt,lichtemo/strategoxt,Apanatshka/strategoxt,metaborg/strategoxt