4 files changed, 25 insertions, 6 deletions
diff --git a/engines/sci/engine/intmap.cpp b/engines/sci/engine/intmap.cpp
index 2cb41551f0..732b69d4ea 100644
--- a/engines/sci/engine/intmap.cpp
+++ b/engines/sci/engine/intmap.cpp
@@ -70,9 +70,9 @@ int IntMapper::checkKey(int key, bool add, bool *was_added) {
 	if (was_added)
 		*was_added = false;
 
-	if (*node) {
+	if (*node)
 		return (*node)->idx;
-	}
+
 	// Not found
 
 	if (!add)
@@ -96,6 +96,18 @@ int IntMapper::checkKey(int key, bool add, bool *was_added) {
 	return (*node)->idx;
 }
 
+int IntMapper::lookupKey(int key) const {
+	Node *const *node = &(nodes[HASH(key)]);
+
+	while (*node && (key != (*node)->key))
+		node = &((*node)->next);
+
+	if (*node)
+		return (*node)->idx;
+	
+	return -1;
+}
+
 void IntMapper::saveLoadWithSerializer(Common::Serializer &s) {
 	s.syncAsSint32LE(base_value);
 	if (s.isLoading()) {
diff --git a/engines/sci/engine/intmap.h b/engines/sci/engine/intmap.h
index 68823789ec..4ada14542a 100644
--- a/engines/sci/engine/intmap.h
+++ b/engines/sci/engine/intmap.h
@@ -93,6 +93,9 @@ public:
 	 */
 	int checkKey(int key, bool add, bool *wasAdded = 0);
 
+	int lookupKey(int key) const;
+
+
 	/**
 	 * Removes a key from the map.
 	 * @param key		The key to remove
diff --git a/engines/sci/engine/seg_manager.cpp b/engines/sci/engine/seg_manager.cpp
index 2b9a1bae8a..ae28b89af7 100644
--- a/engines/sci/engine/seg_manager.cpp
+++ b/engines/sci/engine/seg_manager.cpp
@@ -568,8 +568,8 @@ void SegManager::sm_put_heap(reg_t reg, int16 value) {
 #endif
 
 // return the seg if script_id is valid and in the map, else -1
-int SegManager::segGet(int script_id) {
-	return id_seg_map->checkKey(script_id, false);
+int SegManager::segGet(int script_id) const {
+	return id_seg_map->lookupKey(script_id);
 }
 
 // validate the seg
diff --git a/engines/sci/engine/seg_manager.h b/engines/sci/engine/seg_manager.h
index 78cb8bd005..4fcd938651 100644
--- a/engines/sci/engine/seg_manager.h
+++ b/engines/sci/engine/seg_manager.h
@@ -103,8 +103,7 @@ public:
 	// Get the segment ID associated with a script number
 	// Parameters: (int) script_nr: Number of the script to look up
 	// Returns   : (int) The associated segment ID, or -1 if no matching segment exists
-	// This function is "pure" (i.e, it doesn't modify anything).
-	int segGet(int script_nr);
+	int segGet(int script_nr) const;
 
 
 	// script lock operations
@@ -445,6 +444,11 @@ private:
 
 // 11. Segment interface, primarily for GC
 
+// TODO: Merge SegInterface and MemObject?
+// After all, _mobj->type == _typeId
+// and we make very little use of _segmgr (-> could get rid of that).
+// Other code would benefit, e.g. the saveload code.
+// But note that _mobj->segmgr_id != _segId !
 class SegInterface {
 protected:
 	SegInterface(SegManager *segmgr, MemObject *mobj, SegmentId segId, memObjType typeId);