[Samba] Threaten warnings while compiling Samba 2.2.7a on Solaris 2.5.1

[Pierre Lebrun]

I get warning messages while compiling samba 2.2.7a on Solaris with
Sun cc 4.2
- assignment type mismatch
- argument #1 is incompatible with prototype
- initializer does not fit or is out of range: -1

Must I change variables type in source code to fit what is guessed by 
the compiler ?
Is source 2.2.7a not compatible with Solaris 2.5.1 ?

Thank you for your help.

Pierre