Fix build warnings in av1_cx_iface.c

aq_mode and deltaq_mode are enums starting at zero so checking they
are in the range 0..X triggers a clang warning of the form "comparison
of unsigned enum expression >= 0 is always true".

Change-Id: Ia41d819958ae5a1ac10e6da5550169a2a326bf1a

av1/av1_cx_iface.c

diff --git a/av1/av1_cx_iface.c b/av1/av1_cx_iface.c
index 81fffd1..02370f6 100644
--- a/av1/av1_cx_iface.c
+++ b/av1/av1_cx_iface.c
@@ -222,9 +222,9 @@
   RANGE_CHECK_HI(cfg, rc_max_quantizer, 63);
   RANGE_CHECK_HI(cfg, rc_min_quantizer, cfg->rc_max_quantizer);
   RANGE_CHECK_BOOL(extra_cfg, lossless);
-  RANGE_CHECK(extra_cfg, aq_mode, 0, AQ_MODE_COUNT - 1);
+  RANGE_CHECK_HI(extra_cfg, aq_mode, AQ_MODE_COUNT - 1);
 #if CONFIG_EXT_DELTA_Q
-  RANGE_CHECK(extra_cfg, deltaq_mode, 0, DELTAQ_MODE_COUNT - 1);
+  RANGE_CHECK_HI(extra_cfg, deltaq_mode, DELTAQ_MODE_COUNT - 1);
 #endif
   RANGE_CHECK_HI(extra_cfg, frame_periodic_boost, 1);
   RANGE_CHECK_HI(cfg, g_threads, 64);