add DebugTheme

vtm/src/org/oscim/theme/DebugTheme.java

@@ -0,0 +1,32 @@
+package org.oscim.theme;
+
+import org.oscim.core.GeometryBuffer.GeometryType;
+import org.oscim.core.TagSet;
+import org.oscim.theme.renderinstruction.RenderInstruction;
+
+public class DebugTheme implements IRenderTheme {
+
+	@Override
+	public RenderInstruction[] matchElement(GeometryType type, TagSet tags, int zoomLevel) {
+		return null;
+	}
+
+	@Override
+	public void destroy() {
+	}
+
+	@Override
+	public int getLevels() {
+		return 0;
+	}
+
+	@Override
+	public int getMapBackground() {
+		return 0;
+	}
+
+	@Override
+	public void scaleTextSize(float scaleFactor) {
+	}
+
+}