- use BKE_keyingset_free_path where paths were being freed inline.

- rna_path was being freed when null, printing errors.

source/blender/blenkernel/intern/anim_sys.c

@@ -916,10 +916,11 @@ void BKE_keyingset_free_path (KeyingSet *ks, KS_Path *ksp)
 	/* sanity check */
 	if ELEM(NULL, ks, ksp)
 		return;
-	
+
 	/* free RNA-path info */
-	MEM_freeN(ksp->rna_path);
-	
+	if(ksp->rna_path)
+		MEM_freeN(ksp->rna_path);
+
 	/* free path itself */
 	BLI_freelinkN(&ks->paths, ksp);
 }

source/blender/editors/animation/keyingsets.c

@@ -418,12 +418,9 @@ static int remove_keyingset_button_exec (bContext *C, wmOperator *op)
 			
 			/* try to find a path matching this description */
 			ksp= BKE_keyingset_find_path(ks, ptr.id.data, ks->name, path, index, KSP_GROUP_KSNAME);
-			
+
 			if (ksp) {
-				/* just free it... */
-				MEM_freeN(ksp->rna_path);
-				BLI_freelinkN(&ks->paths, ksp);
-				
+				BKE_keyingset_free_path(ks, ksp);
 				success= 1;
 			}
 			

source/blender/editors/space_outliner/outliner.c

@@ -4144,12 +4144,9 @@ static void do_outliner_keyingset_editop(SpaceOops *soops, KeyingSet *ks, ListBa
 						
 						if (ksp) {
 							/* free path's data */
-							// TODO: we probably need an API method for this 
-							if (ksp->rna_path) MEM_freeN(ksp->rna_path);
+							BKE_keyingset_free_path(ks, ksp);
+
 							ks->active_path= 0;
-							
-							/* remove path from set */
-							BLI_freelinkN(&ks->paths, ksp);
 						}
 					}
 						break;