msi: Remove the hash table for a column when one of its values is modified since it will now be invalid.

Make string table functions that aren't used outside of string.c static.

Store the loaded refcount in the string table.

wined3d: Actually use the calculated mipmap surface sizes in IWineD3DDeviceImpl_CreateVolumeTexture.

SND_PCM_ASYNC was needed to get asynchronous callbacks, but they are
not used any more, so remove the code.