Fix misc unref variable and const cast warnings

src/duk_heap.h

@@ -160,7 +160,7 @@
 /* heap string indices are autogenerated in duk_strings.h */
 #if defined(DUK_USE_ROM_STRINGS)
 #define DUK_HEAP_GET_STRING(heap,idx) \
-	((duk_hstring *) duk_rom_strings_stridx[(idx)])
+	((duk_hstring *) DUK_LOSE_CONST(duk_rom_strings_stridx[(idx)]))
 #else  /* DUK_USE_ROM_STRINGS */
 #if defined(DUK_USE_HEAPPTR16)
 #define DUK_HEAP_GET_STRING(heap,idx) \

src/duk_heap_stringtable.c

@@ -847,7 +847,7 @@ DUK_LOCAL duk_hstring *duk__do_intern(duk_heap *heap, const duk_uint8_t *str, du
 #endif
 
 #if defined(DUK_USE_HSTRING_EXTDATA) && defined(DUK_USE_EXTSTR_INTERN_CHECK)
-	extdata = (const duk_uint8_t *) DUK_USE_EXTSTR_INTERN_CHECK(heap->heap_udata, (void *) str, (duk_size_t) blen);
+	extdata = (const duk_uint8_t *) DUK_USE_EXTSTR_INTERN_CHECK(heap->heap_udata, (void *) DUK_LOSE_CONST(str), (duk_size_t) blen);
 #else
 	extdata = (const duk_uint8_t *) NULL;
 #endif
@@ -900,9 +900,9 @@ DUK_LOCAL duk_hstring *duk__do_lookup(duk_heap *heap, const duk_uint8_t *str, du
 		 */
 		for (i = 0; i < (duk_small_uint_t) (sizeof(duk_rom_strings) / sizeof(duk_hstring *)); i++) {
 			duk_hstring *romstr;
-			romstr = (duk_hstring *) duk_rom_strings[i];
+			romstr = (duk_hstring *) DUK_LOSE_CONST(duk_rom_strings[i]);
 			if (blen == DUK_HSTRING_GET_BYTELEN(romstr) &&
-			    DUK_MEMCMP(str, (void *) DUK_HSTRING_GET_DATA(romstr), blen) == 0) {
+			    DUK_MEMCMP((const void *) str, (const void *) DUK_HSTRING_GET_DATA(romstr), blen) == 0) {
 				DUK_DD(DUK_DDPRINT("intern check: rom string: %!O, computed hash 0x%08lx, rom hash 0x%08lx",
 				                   romstr, (unsigned long) *out_strhash, (unsigned long) DUK_HSTRING_GET_HASH(romstr)));
 				DUK_ASSERT(*out_strhash == DUK_HSTRING_GET_HASH(romstr));

src/duk_hobject_props.c

@@ -161,6 +161,7 @@ DUK_LOCAL duk_uint32_t duk__push_tval_to_hstring_arr_idx(duk_context *ctx, duk_t
 
 /* String is an own (virtual) property of a lightfunc. */
 DUK_LOCAL duk_bool_t duk__key_is_lightfunc_ownprop(duk_hthread *thr, duk_hstring *key) {
+	DUK_UNREF(thr);
 	return (key == DUK_HTHREAD_STRING_LENGTH(thr) ||
 	        key == DUK_HTHREAD_STRING_NAME(thr));
 }

src/duk_hstring.h

@@ -106,7 +106,7 @@
 	((x)->extdata)
 #define DUK_HSTRING_GET_DATA(x) \
 	(DUK_HSTRING_HAS_EXTDATA((x)) ? \
-		DUK_HSTRING_GET_EXTDATA((duk_hstring_external *) (x)) : ((const duk_uint8_t *) ((x) + 1)))
+		DUK_HSTRING_GET_EXTDATA((const duk_hstring_external *) (x)) : ((const duk_uint8_t *) ((x) + 1)))
 #else
 #define DUK_HSTRING_GET_DATA(x) \
 	((const duk_uint8_t *) ((x) + 1))

src/duk_hthread.h

@@ -123,7 +123,7 @@
 
 #if defined(DUK_USE_ROM_STRINGS)
 #define DUK_HTHREAD_GET_STRING(thr,idx) \
-	((duk_hstring *) duk_rom_strings_stridx[(idx)])
+	((duk_hstring *) DUK_LOSE_CONST(duk_rom_strings_stridx[(idx)]))
 #else  /* DUK_USE_ROM_STRINGS */
 #if defined(DUK_USE_HEAPPTR16)
 #define DUK_HTHREAD_GET_STRING(thr,idx) \

src/duk_hthread_builtins.c

@@ -151,7 +151,7 @@ DUK_INTERNAL void duk_hthread_create_builtin_objects(duk_hthread *thr) {
 
 	for (i = 0; i < DUK_NUM_BUILTINS; i++) {
 		duk_hobject *h;
-		h = (duk_hobject *) duk_rom_builtins_bidx[i];
+		h = (duk_hobject *) DUK_LOSE_CONST(duk_rom_builtins_bidx[i]);
 		DUK_ASSERT(h != NULL);
 		thr->builtins[i] = h;
 	}

src/duk_js_ops.c

@@ -1236,6 +1236,8 @@ DUK_INTERNAL duk_bool_t duk_js_in(duk_hthread *thr, duk_tval *tv_x, duk_tval *tv
 DUK_INTERNAL duk_hstring *duk_js_typeof(duk_hthread *thr, duk_tval *tv_x) {
 	duk_small_int_t stridx = 0;
 
+	DUK_UNREF(thr);
+
 	switch (DUK_TVAL_GET_TAG(tv_x)) {
 	case DUK_TAG_UNDEFINED: {
 		stridx = DUK_STRIDX_LC_UNDEFINED;