Add workaround for bug #1668393 - ZAK FM-TOWNS: Crash when entering Hostel from outside.

svn-id: r42590

1 files changed, 13 insertions, 3 deletions

diff --git a/engines/scumm/script_v5.cpp b/engines/scumm/script_v5.cpp
index 1ce38fd800..00dec269bd 100644
--- a/engines/scumm/script_v5.cpp
+++ b/engines/scumm/script_v5.cpp
@@ -1138,9 +1138,19 @@ void ScummEngine_v5::o5_ifClassOfIs() {
 
 	while ((_opcode = fetchScriptByte()) != 0xFF) {
 		cls = getVarOrDirectWord(PARAM_1);
-		b = getClass(obj, cls);
-		if (((cls & 0x80) && !b) || (!(cls & 0x80) && b))
-			cond = false;
+
+		// WORKAROUND bug #1668393: Due to a script bug, the wrong opcode is used
+		// to check the state of the inside door (object 465) of the Hostel on Mars,
+		// when opening the Hostel door from the outside.
+		if (_game.id == GID_ZAK && _game.platform == Common::kPlatformFMTowns &&
+		    vm.slot[_currentScript].number == 205 && _currentRoom == 185 &&
+		    obj == 465 && cls == 0) {
+			cond = (getState(obj) == 0);
+		} else {
+			b = getClass(obj, cls);
+			if (((cls & 0x80) && !b) || (!(cls & 0x80) && b))
+				cond = false;
+		}
 	}
 	jumpRelative(cond);
 }