NLA SoC: Bugfixes + Improvements to 'Push Down' track-selection

* Trying to save no longer crashes in some cases when the NLA Editor was open with some data. The sanity check added in filesel.c might be able to be backported to 2.5? (Elubie, please check)

* NLA-track names now get drawn with the correct colours for identifying themselves as being selected or not selected.

* Now the 'push down' functionality for actions will try to add the new strip to the last NLA track, provided it has space in the range required. 
* When new strips are added, they will only be allowed to extrapolate before/after if they are the first (time-wise) strip for the set of NLA data per AnimData block. This stops layered strips overriding strips that occurred in earlier tracks at earlier times.

1 files changed, 14 insertions, 0 deletions

diff --git a/source/blender/editors/animation/anim_channels.c b/source/blender/editors/animation/anim_channels.c
index a5f2acb591c..5d5be87801b 100644
--- a/source/blender/editors/animation/anim_channels.c
+++ b/source/blender/editors/animation/anim_channels.c
@@ -149,6 +149,13 @@ void ANIM_set_active_channel (void *data, short datatype, int filter, void *chan
 				ACHANNEL_SET_FLAG(fcu, ACHANNEL_SETFLAG_CLEAR, FCURVE_ACTIVE);
 			}
 				break;
+			case ANIMTYPE_NLATRACK:
+			{
+				NlaTrack *nlt= (NlaTrack *)ale->data;
+				
+				ACHANNEL_SET_FLAG(nlt, ACHANNEL_SETFLAG_CLEAR, NLATRACK_ACTIVE);
+			}
+				break;
 		}
 	}
 	
@@ -167,6 +174,13 @@ void ANIM_set_active_channel (void *data, short datatype, int filter, void *chan
 				fcu->flag |= FCURVE_ACTIVE;
 			}
 				break;
+			case ANIMTYPE_NLATRACK:
+			{
+				NlaTrack *nlt= (NlaTrack *)channel_data;
+				
+				ACHANNEL_SET_FLAG(nlt, ACHANNEL_SETFLAG_CLEAR, NLATRACK_ACTIVE);
+			}
+				break;
 		}
 	}