shithub: choc

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opl: Fix crash when using OPL music.

The previous change to add the poll method to the music module
interface introduced a crash, as the OPL music struct does not
define a poll method.

--- a/src/i_oplmusic.c

+++ b/src/i_oplmusic.c

@@ -1479,6 +1479,7 @@

     I_OPL_PlaySong,

     I_OPL_StopSong,

     I_OPL_MusicIsPlaying,

+    NULL,  // Poll

 };

 //----------------------------------------------------------------------

--- a/src/i_sound.c

+++ b/src/i_sound.c

@@ -279,7 +279,7 @@

         sound_module->Update();

     }

-    if (music_module != NULL)

+    if (music_module != NULL && music_module->Poll != NULL)

     {

         music_module->Poll();

     }