- Fix for Wkey menu in WeightPaint modus; it didn't work when the armature

is a modifier only (Armature not parented to Mesh).
  Note; if multiple Modifier/Armatures work, it uses only the first still.

- Armature option 'draw axes' now scales axes to 0.25 of bone length.

source/blender/src/drawarmature.c

@@ -1473,7 +1473,7 @@ static void draw_pose_channels(Base *base, int dt)
 					glPushMatrix();
 					glMultMatrixf(pchan->pose_mat);
 					glTranslatef(0.0f, pchan->bone->length, 0.0f);
-					drawaxes(0.25f);
+					drawaxes(0.25f*pchan->bone->length);
 					glPopMatrix();
 				}
 			}
@@ -1649,7 +1649,7 @@ static void draw_ebones(Object *ob, int dt)
 						glPushMatrix();
 						set_matrix_editbone(eBone);
 						glTranslatef(0.0f, eBone->length, 0.0f);
-						drawaxes(0.25f);
+						drawaxes(eBone->length*0.25f);
 						glPopMatrix();
 					}
 					

source/blender/src/editobject.c

@@ -1999,7 +1999,8 @@ void special_editmenu(void)
 			}
 		}
 		else if(G.f & G_WEIGHTPAINT) {
-			if(ob->parent && (ob->parent->flag & OB_POSEMODE)) {
+			Object *par= modifiers_isDeformedByArmature(ob);
+			if(par && (par->flag & OB_POSEMODE)) {
 				nr= pupmenu("Specials%t|Apply Bone Envelopes to VertexGroups %x1");
 				if(nr==1) {
 					Mesh *me= ob->data;

source/blender/src/poseobject.c

@@ -39,6 +39,7 @@
 #include "DNA_constraint_types.h"
 #include "DNA_mesh_types.h"
 #include "DNA_meshdata_types.h"
+#include "DNA_modifier_types.h"
 #include "DNA_object_types.h"
 #include "DNA_scene_types.h"
 #include "DNA_screen_types.h"
@@ -52,6 +53,7 @@
 #include "BKE_DerivedMesh.h"
 #include "BKE_displist.h"
 #include "BKE_global.h"
+#include "BKE_modifier.h"
 #include "BKE_object.h"
 #include "BKE_utildefines.h"
 
@@ -609,7 +611,7 @@ void pose_adds_vgroups(Object *meshobj)
 {
 	struct vgroup_map map;
 	DerivedMesh *dm;
-	Object *poseobj= meshobj->parent;
+	Object *poseobj= modifiers_isDeformedByArmature(meshobj);
 	bPoseChannel *pchan;
 	Bone *bone;
 	bDeformGroup *dg;