Added set lineWidth to wireframe table.

src/docs/asciidoc/jme3/intermediate/how_to_use_materials.adoc

@@ -360,4 +360,7 @@ a|getAdditionalRenderState().setWireframe(true);
 a|Switch to showing the (textured) Material in wireframe mode. The wireframe optionally uses the Material's `Color` value.
 a|Use wireframes to debug meshes, or for a “matrix or “holodeck effect.
 
+a|getAdditionalRenderState().setLineWidth(2f);
+a|When in wireframe mode, sets the line width of the mesh.
+a|
 |===