poll functions to stop crashing when running operators in an invalid context.

1 files changed, 10 insertions, 0 deletions

diff --git a/source/blender/editors/space_buttons/buttons_ops.c b/source/blender/editors/space_buttons/buttons_ops.c
index 057f35a2487..954a52c54aa 100644
--- a/source/blender/editors/space_buttons/buttons_ops.c
+++ b/source/blender/editors/space_buttons/buttons_ops.c
@@ -613,6 +613,12 @@ void OBJECT_OT_particle_system_remove(wmOperatorType *ot)
 
 /********************** new particle settings operator *********************/
 
+static int psys_poll(bContext *C)
+{
+	PointerRNA ptr = CTX_data_pointer_get_type(C, "particle_system", &RNA_ParticleSystem);
+	return (ptr.data != NULL);
+}
+
 static int new_particle_settings_exec(bContext *C, wmOperator *op)
 {
 	Scene *scene = CTX_data_scene(C);
@@ -657,6 +663,7 @@ void PARTICLE_OT_new(wmOperatorType *ot)
 	
 	/* api callbacks */
 	ot->exec= new_particle_settings_exec;
+	ot->poll= psys_poll;
 
 	/* flags */
 	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
@@ -948,6 +955,9 @@ static int file_browse_exec(bContext *C, wmOperator *op)
 	FileBrowseOp *fbo= op->customdata;
 	char *str;
 	
+	if (RNA_property_is_set(op->ptr, "filename")==0 || fbo==NULL)
+		return OPERATOR_CANCELLED;
+	
 	str= RNA_string_get_alloc(op->ptr, "filename", 0, 0);
 	RNA_property_string_set(&fbo->ptr, fbo->prop, str);
 	RNA_property_update(C, &fbo->ptr, fbo->prop);