ScmRevGen: Bump version to 2606a

We already had code to close open host files when reading or writing a
savestate, but due to d35fe1b we also need to close open guest files
when reading a savestate, otherwise DoStateRead fails to delete them.

I was considering an alternative solution where instead of copying and
clearing m_handles, we just set `handle.opened = false;` for each handle
before reading a savestate (but not before writing a savestate).
However, this wouldn't solve the problem of DoStateWriteOrMeasure's
calls to OpenFile failing due to all handles being open. I'm not aware
of any games that have that many handles open, though.

Source/Core/Core/HW/DSPHLE/UCodes/Zelda.cpp

@@ -1468,16 +1468,9 @@ void ZeldaAudioRenderer::LoadInputSamples(MixingBuffer* buffer, VPB* vpb)
   // the end of processing, if needed.
   //
   // Maximum of 0x500 samples here - see NeededRawSamplesCount to understand
-  // this practical limit (resampling_ratio = 0xFFFF -> 0x500 samples).
-  //
-  // If current_pos_frac contains an (invalid) non-fractional part, it can push
-  // this up by another 15 samples. Which DownloadAFCSamplesFromARAM then rounds
-  // up to the next multiple of 16. So add an extra 0x10 samples to be safe.
-  //
-  // Plus we need an extra four samples at the start to hold the last four
-  // samples from the previous frame.
-
-  std::array<s16, 4 + 0x500 + 0x10> raw_input_samples;
+  // this practical limit (resampling_ratio = 0xFFFF -> 0x500 samples). Add a
+  // margin of 4 that is needed for samples source that do resampling.
+  std::array<s16, 0x500 + 4> raw_input_samples;
   for (size_t i = 0; i < 4; ++i)
     raw_input_samples[i] = vpb->resample_buffer[i];