[nostalgia/core/studio] Fix tile sheet editor to correctly iterate over tiles

src/nostalgia/core/studio/Pixel.qml

@@ -4,7 +4,7 @@ import QtQuick 2.0
 Rectangle {
 	id: pixel;
 	property int pixelNumber: index
-	color: sheetData.pixel(index)
+	color: sheetData.pixel(pixelNumber)
 	width: parent.width / 8
 	height: parent.height / 8
 	border.color: '#717d7e'

src/nostalgia/core/studio/Tile.qml

@@ -18,7 +18,7 @@ Rectangle {
 		Repeater {
 			model: 64
 			Pixel {
-				pixelNumber: index
+				pixelNumber: index + 64 * tile.tileNumber
 			}
 		}
 	}