Stop on bntest error.

test/Makefile.ssl

@@ -193,7 +193,7 @@ test_pkcs7:
 
 test_bn:
 	@echo starting big number library test, could take a while...
-	-@./$(BNTEST) >tmp.bntest
+	@./$(BNTEST) >tmp.bntest
 	@echo quit >>tmp.bntest
 	@echo "running bc"
 	@<tmp.bntest sh -c "`sh ./bctest`" | $(PERL) -e '$$i=0; while (<STDIN>) {if (/^test (.*)/) {print STDERR "\nverify $$1";} elsif (!/^0$$/) {die "\nFailed! bc: $$_";} else {print STDERR "."; $$i++;}} print STDERR "\n$$i tests passed\n"'