CINE: Fix CollisionPage Uninitialised Reads in Operation Stealth.

The collisionPage is only initialised with values when loadCtFw() / loadCtOS() is called.
However, currently during the display of the Delphine Software Logo in Operation Stealth,
checkCollision() is called, but the collisionPage has not been loaded.
To fix the invalid reads, have added code to set the page to zero after allocation.
Shouldn't cause any issues to FW as this will load over the top anyway.

Have also added debug output around this behaviour so that if this is not sufficient i.e. a collision page load is actually missing, then this will aid investigation.

svn-id: r55071

1 files changed, 5 insertions, 3 deletions

diff --git a/engines/cine/cine.cpp b/engines/cine/cine.cpp
index 38a0eda13e..5498b0f977 100644
--- a/engines/cine/cine.cpp
+++ b/engines/cine/cine.cpp
@@ -53,9 +53,10 @@ Sound *g_sound = 0;
 CineEngine *g_cine = 0;
 
 CineEngine::CineEngine(OSystem *syst, const CINEGameDescription *gameDesc) : Engine(syst), _gameDescription(gameDesc) {
-	DebugMan.addDebugChannel(kCineDebugScript, "Script", "Script debug level");
-	DebugMan.addDebugChannel(kCineDebugPart,   "Part",   "Part debug level");
-	DebugMan.addDebugChannel(kCineDebugSound,  "Sound",  "Sound debug level");
+	DebugMan.addDebugChannel(kCineDebugScript,    "Script",    "Script debug level");
+	DebugMan.addDebugChannel(kCineDebugPart,      "Part",      "Part debug level");
+	DebugMan.addDebugChannel(kCineDebugSound,     "Sound",     "Sound debug level");
+	DebugMan.addDebugChannel(kCineDebugCollision, "Collision", "Collision debug level");
 	_console = new CineConsole(this);
 
 	// Setup mixer
@@ -161,6 +162,7 @@ void CineEngine::initialize() {
 	renderer->initialize();
 
 	collisionPage = new byte[320 * 200];
+	memset(collisionPage, 0, 320 * 200);
 
 	// Clear part buffer as there's nothing loaded into it yet.
 	// Its size will change when loading data into it with the loadPart function.