Compiler warning about changed sign for uint

[jkwashbourne-oss]

I started testing with lzav and find this compiler warning, which makes me nervous considering uint LHS. Cheers

"lzav.h", line 653: warning: integer conversion resulted in a change of sign [integer_sign_change]
                uint32_t ov = (uint32_t) ( 255 << 24 | d << 6 | 2 << 4 );
                                           ^

"lzav.h", line 664: warning: integer conversion resulted in a change of sign [integer_sign_change]
        uint32_t ov = (uint32_t) ( 255 << 24 | d >> 2 );
                                   ^

[avaneev]

Could you please try inserting (uint32_t) 255 in these cases? If that works, I'll update the code soon. Compilers I use do not show the warning.

[avaneev]

I've changed the code, hopefully it fixes the warning.