Fix the Valgrind warning about the save game menu in Zak.

I think that it's better to compute the height with the modified
parameters and not with the original ones. Endy, otherse, please
comment :-)

Anyway, there seems to be some bugs remaining :

 1) the save game menu is really weird looking (ie instead of having
    the game name displayed in the top left, there is 'How may I serve
    you ?' instead (maybe normal after all :-) and there seems to be
    some black missing).

 2) in the same code I move, there is this :

	if(height > 200)
		height = 200;

    Why limit at 200 for a game that supports 240 :-) ?

svn-id: r4329

1 files changed, 4 insertions, 5 deletions

diff --git a/gfx.cpp b/gfx.cpp
index 8ba83cc8fa..9bf3bf2243 100644
--- a/gfx.cpp
+++ b/gfx.cpp
@@ -210,11 +210,6 @@ void Gdi::drawStripToScreen(VirtScreen * vs, int x, int w, int t, int b)
 	int scrollY;
 	int height;
 
-	height = b - t;
-
-	if(height > 200)
-		height = 200;
-
 	if (b <= t)
 		return;
 
@@ -224,6 +219,10 @@ void Gdi::drawStripToScreen(VirtScreen * vs, int x, int w, int t, int b)
 	if (b > vs->height)
 		b = vs->height;
 
+	height = b - t;
+	if(height > 200)
+		height = 200;
+
 	scrollY = _vm->camera._cur.y - 100;
 	if(scrollY == -100)
 		scrollY = 0;