Cleaned up handling of what things should be drawn by using the DrawWhat enumeration type.

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@1072 0fc631ac-6414-0410-93d0-97cfa31319b6

src/render/text/viewer.cpp

@@ -70,6 +70,8 @@ TextViewer::~TextViewer() {}
 
 void TextViewer::draw(RotatedDC& dc, const TextStyle& style, DrawWhat what) {
 	assert(!lines.empty());
+	// draw anything?
+	if (what == DRAW_NOTHING) return;
 	// separator lines?
 	// do this first, so pen is still set from drawing the field border
 	if (what & DRAW_BORDERS) {