[CrystalSpace] #964: csHashReversible is missing for a empty function

#964: csHashReversible is missing for a empty function
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 Reporter:  steel    |       Owner:  jorrit
     Type:  defect   |      Status:  new   
 Priority:  major    |   Milestone:        
Component:  general  |     Version:  V1.4  
 Keywords:           |  
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 csHashReversible is not completely dropped when Empty is called.

 This lead to memory performance decrease and may result on several bugs,
 for example if Put is called after empty the we retrieve a key from his
 value.

 This can point to an non valid comportement.

 This patch add the corresponding function.

-- 
Ticket URL: <http://crystalspace3d.org/trac/CS/ticket/964>
CrystalSpace <http://www.crystalspace3d.org/>
Free open-source 3D SDK.
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