THRIFT-2352 msvc failed to compile thrift tests

Patch: Sergei Nikulov & Roger Meier
diff --git a/test/DebugProtoTest.thrift b/test/DebugProtoTest.thrift
index e2bba40..3cb3478 100644
--- a/test/DebugProtoTest.thrift
+++ b/test/DebugProtoTest.thrift
@@ -27,7 +27,7 @@
  3: double neginf,
  4: double repeating,
  5: double big,
- 6: double small,
+ 6: double tiny,
  7: double zero,
  8: double negzero,
 }