Compiler warnings on HP Itanium

Hi,

I encountered the following warnings while compiling libssh2 v1.1 on
ia64-hp-hpux11.23

"sftp.c", line 1993: warning #2068-D: integer conversion resulted in a
change
          of sign
          retcode = -1;
                    ^
"sftp.c", line 2000: warning #2068-D: integer conversion resulted in a
change
          of sign
          retcode = -1;
                    ^
"sftp.c", line 2007: warning #2068-D: integer conversion resulted in a
change
          of sign
          retcode = -1;
                    ^

'retcode' is defined as 'unsigned long'. Is this intentional? I'm
referring to

http://docs.hp.com/en/11925/Diagnostics_Documentation/Diagnostics_index.
htm#2068

"2068 integer conversion resulted in a change of sign

Cause:
Conversion of integer resulted in sign change. Either an unsigned 1-bit
bitfield was assigned -1, or a signed 1-bit bitfield was assigned 1.

Example:

                #define NEGATIVE (-1)
                int main() {
                    unsigned int a = NEGATIVE;
                }

Action:
Conversion from a signed int to unsigned leads to change of sign. This
might result in an unexpected behavior of the code. If the sign of the
integer is not a concern, then this diagnostic can be ignored.
Otherwise, do not assign a signed value to unsigned type and vice versa.
"

Br,

/jUSSi

--
perl -e '$@=[[0,0112,0,0],[0,0101,0,0],
[0,0120,0,0],[0,0110,0,0]];$[=256/8-0x1D;
print(chr(@{$_}[+($[+1-1+1)]))for(@{$@});' 
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