Add NOFAST for structs_02b

Author: certik

integration_tests/CMakeLists.txt

@@ -569,7 +569,7 @@ RUN(NAME test_bool_binop     LABELS cpython llvm c)
 RUN(NAME test_issue_518      LABELS cpython llvm c NOFAST)
 RUN(NAME structs_01          LABELS cpython llvm c)
 RUN(NAME structs_02          LABELS cpython llvm c)
-RUN(NAME structs_02b         LABELS cpython llvm c)
+RUN(NAME structs_02b         LABELS cpython llvm c NOFAST)
 RUN(NAME structs_03          LABELS llvm c)
 RUN(NAME structs_04          LABELS cpython llvm c)
 RUN(NAME structs_05          LABELS cpython llvm c)