GLK: FROTZ: Fix drawing graphics in Zork Zero vs Arthur

In Zork Zero, grahpics drawn to window 0 (the text buffer)
are always treated as being interleaved with the text.
Whereas in Arthur, the title screens are drawn to window 0,
so have to be drawn to the background

1 files changed, 3 insertions, 2 deletions

diff --git a/engines/glk/frotz/processor_windows.cpp b/engines/glk/frotz/processor_windows.cpp
index 517296cdd2..3508bca6fc 100644
--- a/engines/glk/frotz/processor_windows.cpp
+++ b/engines/glk/frotz/processor_windows.cpp
@@ -49,8 +49,9 @@ void Processor::z_draw_picture() {
 	flush_buffer();
 
 	Window &win = _wp[_wp._cwin];
-	if (_wp._cwin == 0) {
-		// Embedded picture within the text area
+	if (_storyId == ZORK_ZERO && _wp._cwin == 0) {
+		// WORKAROUND: Zork Zero has pictures for graphics embedded in the text with specific
+		// co-prdinates. We need to reset it to 0,0 to flag it should be drawn at the cursor
 		x = y = 0;
 	} else {
 		assert(x && y);