Fix spelling error 'Inconsistant -> Inconsistent'

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/dcadec.c

@@ -2415,7 +2415,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
          * masks in some sense -- unfortunately some channels could overlap */
         if (av_popcount(channel_mask) != av_popcount(channel_layout)) {
             av_log(avctx, AV_LOG_DEBUG,
-                   "DTS-XXCH: Inconsistant avcodec/dts channel layouts\n");
+                   "DTS-XXCH: Inconsistent avcodec/dts channel layouts\n");
             return AVERROR_INVALIDDATA;
         }