[hackers] [sbase] Use SSIZE_MAX for overflow check in parseoffset() || sin

[git]

commit 67157b7c4ea433f3a8dcbdfb5dbbc21108268852
Author:     sin <s...@2f30.org>
AuthorDate: Thu Nov 26 10:30:35 2015 +0000
Commit:     sin <s...@2f30.org>
CommitDate: Thu Nov 26 10:35:46 2015 +0000

    Use SSIZE_MAX for overflow check in parseoffset()
    
    There's no such thing as OFF_MAX so we can't use that.  off_t is
    signed, so use SSIZE_MAX which will typically match the range of
    off_t.

diff --git a/libutil/parseoffset.c b/libutil/parseoffset.c
index 37673da..362a782 100644
--- a/libutil/parseoffset.c
+++ b/libutil/parseoffset.c
@@ -52,7 +52,7 @@ parseoffset(const char *str)
        }
 
        /* prevent overflow */
-       if (res > (SIZE_MAX / scale)) {
+       if (res > (SSIZE_MAX / scale)) {
                weprintf("parseoffset %s: out of range\n", str);
                return -1;
        }