- patch submitted by guitargeek

-includes:
*Text3d accessors - ablity to manipulate FONT objects through python
*update to Object.link - calls text_to_curve upon ob_font link for drawing
*update to constant.h - constant type checking define
*update to curve.c - clamp values on getters/setters
*clean up of Text3d module

source/blender/python/api2_2x/Object.c

@@ -1305,6 +1305,10 @@ static PyObject *Object_link( BPy_Object * self, PyObject * args )
 		EXPP_synchronizeMaterialLists( self->object );
 	}
 
+	//creates the curve for the text object
+	if (self->object->type == OB_FONT) 
+		text_to_curve(self->object, 0);
+
 	id_us_plus( id );
 	if( oldid ) {
 		if( oldid->us > 0 ) {