Fix a doc and a test issue not caught by CI

Author: akien-mga

doc/classes/TileMapLayer.xml

@@ -268,7 +268,7 @@
 			The quadrant size does not apply on a Y-sorted [TileMapLayer], as tiles are be grouped by Y position instead in that case.
 			[b]Note:[/b] As quadrants are created according to the map's coordinate system, the quadrant's "square shape" might not look like square in the [TileMapLayer]'s local coordinate system.
 		</member>
-		<member name="tile_map_data" type="PackedByteArray" setter="set_tile_map_data_from_array" getter="get_tile_map_data_as_array" default="PackedByteArray(0, 0)">
+		<member name="tile_map_data" type="PackedByteArray" setter="set_tile_map_data_from_array" getter="get_tile_map_data_as_array" default="PackedByteArray(&quot;AAA=&quot;)">
 			The raw tile map data as a byte array.
 		</member>
 		<member name="tile_set" type="TileSet" setter="set_tile_set" getter="get_tile_set">

tests/core/templates/test_oa_hash_map.h

@@ -100,11 +100,9 @@ TEST_CASE("[OAHashMap] Iteration") {
 	expected.push_back(Pair<int, int>(0, 12934));
 	expected.push_back(Pair<int, int>(123485, 1238888));
 
-	int idx = 0;
 	for (OAHashMap<int, int>::Iterator it = map.iter(); it.valid; it = map.next_iter(it)) {
 		int64_t result = expected.find(Pair<int, int>(*it.key, *it.value));
 		CHECK(result >= 0);
-		idx++;
 	}
 }