UPBGE: Fix timer documentation.

The life or time value is based on 50fps frame which corespond to time * 1/50 seconds.

Author: panzergame

doc/python_api/rst/bge_types/bge.types.KX_GameObject.rst

@@ -468,8 +468,7 @@ base class --- :class:`SCA_IObject`
 
    .. attribute:: life
 
-      The number of seconds until the object ends, assumes 50fps.
-      (when added with an add object actuator), (read-only).
+      The number of frames until the object ends, assumes one frame is 1/50 second (read-only).
 
       :type: float
 

doc/python_api/rst/bge_types/bge.types.KX_Scene.rst

@@ -145,7 +145,7 @@ base class --- :class:`PyObjectPlus`
       :type object: :class:`KX_GameObject` or string
       :arg reference: The (name of the) object which position, orientation, and scale to copy (optional), if the object to add is a light and there is not reference the light's layer will be the same that the active layer in the blender scene.
       :type reference: :class:`KX_GameObject` or string
-      :arg time: The lifetime of the added object, in frames. A time of 0 means the object will last forever (optional).
+      :arg time: The lifetime of the added object, in frames (assumes one frame is 1/50 second). A time of 0 means the object will last forever (optional).
       :type time: integer
       :return: The newly added object.
       :rtype: :class:`KX_GameObject`