NSISArray plugin

[Wizarth]

I tried using this plugin today, and find that the ${myArray->SizeOf} macro would cause an error. After assorted cursing and headscratching, I discovered:

Line 686 of NSISArray.nsh:
!macro Array_IndexesOf Name VarBufferLen VarItems VarIndexes

should be
!macro Array_SizeOf Name VarBufferLen VarItems VarIndexes

Note that this bug did cause the Examples/NSISArray/Sizeof.nsi to fail, and this change fixed it.