Fix a signed/unsigned warning

p4raw-id: //depot/perl@28523

diff --git a/doio.c b/doio.c
index 8b9c6b2..8a04766 100644 (file)
--- a/doio.c
+++ b/doio.c
@@ -2317,7 +2317,7 @@ Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
        STRLEN len;
 
        const char *mbuf = SvPV_const(mstr, len);
-       const I32 n = (len > msize) ? msize : len;
+       const I32 n = ((I32)len > msize) ? msize : (I32)len;
        Copy(mbuf, shm + mpos, n, char);
        if (n < msize)
            memzero(shm + mpos + n, msize - n);