Don't allow soundfonts with existing presets in alLoadSoundfontSOFT

1 files changed, 5 insertions, 0 deletions

diff --git a/OpenAL32/alMidi.c b/OpenAL32/alMidi.c
index 17384bcf..3bf0acc4 100644
--- a/OpenAL32/alMidi.c
+++ b/OpenAL32/alMidi.c
@@ -86,6 +86,11 @@ AL_API void AL_APIENTRY alLoadSoundfontSOFT(ALuint id, size_t(*cb)(ALvoid*,size_
         WriteUnlock(&sfont->Lock);
         SET_ERROR_AND_GOTO(context, AL_INVALID_OPERATION, done);
     }
+    if(sfont->NumPresets > 0)
+    {
+        WriteUnlock(&sfont->Lock);
+        SET_ERROR_AND_GOTO(context, AL_INVALID_OPERATION, done);
+    }
 
     reader.cb = cb;
     reader.ptr = user;