Extended advancedDetector with depth parameter.

Now AD can search nested directories. By default it is turned off,
but there is new parameter to ADParameters struct. Usually value
of 2 is good enough for all purposes.

svn-id: r49653

engines/mohawk/detection.cpp

@@ -1011,7 +1011,9 @@ static const ADParams detectionParams = {
 	// Flags
 	0,
 	// Additional GUI options (for every game)
-	Common::GUIO_NONE
+	Common::GUIO_NONE,
+	// Maximum directory depth
+	1
 };
 
 class MohawkMetaEngine : public AdvancedMetaEngine {