Fix off-by-one error of max w/h in validate_config

Fix the off-by-one errors of maximum g_w and g_h in validate_config().

Bug: aomedia:3304
Change-Id: I524f681bbe359264d1f490e2c0e243afdd7d80bf
diff --git a/av1/av1_cx_iface.c b/av1/av1_cx_iface.c
index 4dc25b5..872f568 100644
--- a/av1/av1_cx_iface.c
+++ b/av1/av1_cx_iface.c
@@ -612,8 +612,8 @@
 static aom_codec_err_t validate_config(aom_codec_alg_priv_t *ctx,
                                        const aom_codec_enc_cfg_t *cfg,
                                        const struct av1_extracfg *extra_cfg) {
-  RANGE_CHECK(cfg, g_w, 1, 65535);  // 16 bits available
-  RANGE_CHECK(cfg, g_h, 1, 65535);  // 16 bits available
+  RANGE_CHECK(cfg, g_w, 1, 65536);  // 16 bits available
+  RANGE_CHECK(cfg, g_h, 1, 65536);  // 16 bits available
   RANGE_CHECK(cfg, g_timebase.den, 1, 1000000000);
   RANGE_CHECK(cfg, g_timebase.num, 1, cfg->g_timebase.den);
   RANGE_CHECK_HI(cfg, g_profile, MAX_PROFILES - 1);