usage.dox: fix doxygen warnings in 1.8.x

use \li to denote list items with \if.

fixes the following likely visible in <1.8.3:
usage.dox: warning: Invalid list item found
usage.dox: warning: End of list marker found without any preceding list items

Change-Id: I33c72799edf9f8866596ac8f79247050b8c75681

diff --git a/usage.dox b/usage.dox
index 6bfca3bc80562d0f1e16d201493bccd3a92c699d..30f38531e681efad7118aca678966268ea78d5e8 100644 (file)
--- a/usage.dox
+++ b/usage.dox
@@ -81,12 +81,12 @@
 
     The available initialization methods are:
     \if encoder
-     - #vpx_codec_enc_init (calls vpx_codec_enc_init_ver())
-     - #vpx_codec_enc_init_multi (calls vpx_codec_enc_init_multi_ver())
-     .
+    \li #vpx_codec_enc_init (calls vpx_codec_enc_init_ver())
+    \li #vpx_codec_enc_init_multi (calls vpx_codec_enc_init_multi_ver())
+    \endif
+    \if decoder
+    \li #vpx_codec_dec_init (calls vpx_codec_dec_init_ver())
     \endif
-    \if decoder - #vpx_codec_dec_init (calls vpx_codec_dec_init_ver()) \endif
-
 
 
     \section usage_errors Error Handling