mpm/ac: fix PID mask in SCACSearch u32 branch

Lookup code used a different mask than the construct code.

Ticket: #8820.

src/util-mpm-ac.c

@@ -920,7 +920,7 @@ uint32_t SCACSearch(const MpmCtx *mpm_ctx, MpmThreadCtx *mpm_thread_ctx,
                 const uint32_t *pids = ctx->output_table[state & 0x00FFFFFF].pids;
                 for (uint32_t k = 0; k < no_of_entries; k++) {
                     if (pids[k] & AC_CASE_MASK) {
-                        const uint32_t lower_pid = pids[k] & 0x0000FFFF;
+                        const uint32_t lower_pid = pids[k] & AC_PID_MASK;
                         const SCACPatternList *pat = &pid_pat_list[lower_pid];
                         const int offset = i - pat->patlen + 1;