Bugfixes for previous commit:

* Now Blender doesn't segfault when trying to add a marker to nowhere.
(Missing checks for NULL marker lists)

* Line widths should now not be widened after drawing markers.

Thanks malefico and Plumiferos team for testing

source/blender/src/drawaction.c

@@ -249,6 +249,8 @@ static void draw_marker(TimeMarker *marker)
 	glVertex2fv(vec);
 	glEnd();
 	
+	glLineWidth(1.0);
+	
 	
 	/* 5 px to offset icon to align properly, space / pixels corrects for zoom */
 	if(marker->flag & SELECT)

source/blender/src/editaction.c

@@ -2888,6 +2888,9 @@ void add_saction_marker (ListBase *markers, int frame)
 {
 	TimeMarker *marker;
 	
+	if (markers == NULL)
+		return;
+	
 	/* two markers can't be at the same place */
 	for(marker= markers->first; marker; marker= marker->next)
 		if(marker->frame == frame) return;
@@ -2940,6 +2943,9 @@ void duplicate_saction_markers(ListBase *markers)
 {
 	TimeMarker *marker, *newmarker;
 
+	if (markers == NULL)
+		return;
+	
 	/* go through the list of markers, duplicate selected markers and add duplicated copies
 	 * to the begining of the list (unselect original markers) */
 	for(marker= markers->first; marker; marker= marker->next) {