Workaround build breakers. Needs review.

These changes fix a broken build in Windows.
#include <algorithm> needed for min/max to be in std.
decltype(+name) was declaring a const variable, that could not be incremented.  Changed to auto.

src/effects/SoundTouchEffect.cpp

@@ -291,7 +291,7 @@ bool EffectSoundTouch::ProcessStereo(WaveTrack* leftTrack, WaveTrack* rightTrack
       rightTrack->Get((samplePtr)(rightBuffer), floatSample, sourceSampleCount, blockSize);
 
       // Interleave into soundTouchBuffer.
-      for (decltype(+blockSize) index = 0; index < blockSize; index++) {
+      for (auto index = 0; index < blockSize; index++) {
          soundTouchBuffer[index*2]       = leftBuffer[index];
          soundTouchBuffer[(index*2)+1]   = rightBuffer[index];
       }