Don't crash if one specify '-S' or '-s' and an invalid configuration file.

src/main.c

@@ -170,18 +170,19 @@ int check_configuration(int dump)
 
 	if (dump)
 	{
-		dump_config(&configuration, dump > 1);
+		if (ret != -1)
-		puts("");
+		{
-	}
+			dump_config(&configuration, dump > 1);
-	
+		}
-	if (dump)
 		return 0;
+	}
 
 	if (ret == -1)
 	{
 		fprintf(stderr, "ERROR\n");
         	return 1;
 	}
+
 	fprintf(stdout, "OK\n");
 	return 0;
 }