fixed memory leaks

Makefile.am

@@ -37,11 +37,15 @@ common_SOURCES = \
 run: $(sbin_PROGRAMS)
 	./cworker
 
+if HAVE_VALGRIND
+VALGRIND_OPT = --tool=memcheck
+endif
+
 test: $(bin_TESTS)
 	@for test in $(bin_TESTS); do \
-	  echo === Test $${test} ==; \
-	  ./$${test}; \
-	  echo === Done $${test} ==; \
+	  echo ======= Test $${test} ======; \
+	  $(VALGRIND) $(VALGRIND_OPT) ./$${test}; \
+	  echo ====== Done $${test} ======; \
 	done
 
 bin_TESTS = \