Descriptionsyscall: use unsafe.Pointer instead of uintptr on windows when possible
Fixes issue 7171
   
  Patch Set 1 #Patch Set 2 : diff -r 1474b280d7aa https://go.googlecode.com/hg/ #Patch Set 3 : diff -r 1474b280d7aa https://go.googlecode.com/hg/ #Patch Set 4 : diff -r 88b3b2fa4dde https://go.googlecode.com/hg/ #
 MessagesTotal messages: 5 
  
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