Silence Coverity Scan false positive

[monich]

236 GStrV*
237 gutil_strv_remove(
238     GStrV* sv,
239     const char* s,
240     gboolean remove_all)
241 {
       1. Condition sv, taking true branch.
       2. Condition s, taking true branch.
242     if (G_LIKELY(sv) && G_LIKELY(s)) {
       3. tainted_data_return: Called function gutil_strv_find(sv, s), and a possible return value may be less than zero.
       4. assign: Assigning: pos = gutil_strv_find(sv, s).
243         const int pos = gutil_strv_find(sv, s);
244
       5. Condition pos >= 0, taking true branch.
245         if (pos >= 0) {
246             guint len = gutil_strv_length(sv);
247
248             sv = gutil_strv_remove_impl(sv, pos, len, TRUE);
       6. Condition remove_all, taking true branch.
249             if (remove_all) {
250                 int i, l;
251
252                 len--;
253                 l = len - pos;
       7. Condition (i = gutil_strv_find_last_impl(sv + pos, s, l)) >= 0, taking true branch.
254                 while ((i = gutil_strv_find_last_impl(sv + pos, s, l)) >= 0) {
       8. overflow: The expression pos + i is considered to have possibly overflowed.
CID 1620096: (#1 of 1): Overflowed integer argument (INTEGER_OVERFLOW)
9. overflow_sink: pos + i, which might have overflowed, is passed to gutil_strv_remove_impl(sv, pos + i, len--, 1).[show details]
255                     sv = gutil_strv_remove_impl(sv, pos + i, len--, TRUE);
256                     l = i;
257                 }
258             }
259         }
260     }
261     return sv;