Fix NaN normalization bug for packed tval

NaN normalization check should use a full NaN check to decide when to
normalize, even when using partial NaN initialization.  The fix here
is to switch to full NaN initialization in general.

src-input/duk_dblunion.h

@@ -322,7 +322,8 @@ typedef union duk_double_union duk_double_union;
 	} while (0)
 
 #define DUK__DBLUNION_NORMALIZE_NAN_CHECK_NOTFULL(u)  do { \
-		if (DUK__DBLUNION_IS_NAN_NOTFULL((u))) { \
+		/* Check must be full. */ \
+		if (DUK__DBLUNION_IS_NAN_FULL((u))) { \
 			DUK__DBLUNION_SET_NAN_NOTFULL((u)); \
 		} \
 	} while (0)
@@ -334,12 +335,11 @@ typedef union duk_double_union duk_double_union;
  */
 
 #if defined(DUK_USE_PACKED_TVAL)
-#if defined(DUK_USE_FULL_TVAL)
 #define DUK_DBLUNION_NORMALIZE_NAN_CHECK(u)  DUK__DBLUNION_NORMALIZE_NAN_CHECK_FULL((u))
 #define DUK_DBLUNION_IS_NAN(u)               DUK__DBLUNION_IS_NAN_FULL((u))
 #define DUK_DBLUNION_IS_NORMALIZED_NAN(u)    DUK__DBLUNION_IS_NORMALIZED_NAN_FULL((u))
 #define DUK_DBLUNION_SET_NAN(d)              DUK__DBLUNION_SET_NAN_FULL((d))
-#else
+#if 0
 #define DUK_DBLUNION_NORMALIZE_NAN_CHECK(u)  DUK__DBLUNION_NORMALIZE_NAN_CHECK_NOTFULL((u))
 #define DUK_DBLUNION_IS_NAN(u)               DUK__DBLUNION_IS_NAN_NOTFULL((u))
 #define DUK_DBLUNION_IS_NORMALIZED_NAN(u)    DUK__DBLUNION_IS_NORMALIZED_NAN_NOTFULL((u))

tests/ecmascript/test-bug-packed-tval-nan-normalize.js

@@ -0,0 +1,19 @@
+/*---
+{
+    "custom": true
+}
+---*/
+
+/*===
+NaN
+done
+===*/
+
+try {
+    var val = CBOR.decode(new Uint8Array([ 0xfb, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 ]));
+    print(val);
+} catch (e) {
+    print(e.stack || e);
+}
+
+print('done');