add optimizations back to test build

Makefile

@@ -35,7 +35,7 @@ TEST_SRCS=debug.c   memory.c chunk.c value.c scanner.c compiler.c vm.c object.c
 TEST_FILES=test/test_object.c test/test_nodes.c test/test_compiler.c test/test_vm.c test/test_gc.c test/test_examples.c test/test_regex.c
 DEBUG_FLAGS=-O2 -g -rdynamic
 GPROF_FLAGS=-O3 -pg -DNDEBUG
-TEST_FLAGS=-O0 -g -rdynamic -Itest/include -I. -DLOX_TEST
+TEST_FLAGS=-O2 -g -rdynamic -Itest/include -I. -DLOX_TEST
 RELEASE_FLAGS=-O3 -DNDEBUG -Wno-unused-function -Wno-unused-variable
 BUILD_DIR=bin
 BUILD_DEBUG_DIR:=${BUILD_DIR}/debug