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/Reverse.cpp

@@ -235,7 +235,7 @@ bool EffectReverse::ProcessOneClip(int count, WaveTrack *track,
 
       track->Get((samplePtr)buffer1, floatSample, first, block);
       track->Get((samplePtr)buffer2, floatSample, second, block);
-      for (decltype(+block) i = 0; i < block; i++) {
+      for (auto i = 0; i < block; i++) {
          tmp = buffer1[i];
          buffer1[i] = buffer2[block-i-1];
          buffer2[block-i-1] = tmp;

src/effects/SBSMSEffect.cpp

@@ -108,7 +108,7 @@ long resampleCB(void *cb_data, SBSMSFrame *data)
    r->rightTrack->Get((samplePtr)(r->rightBuffer), floatSample, r->offset, blockSize);
 
    // convert to sbsms audio format
-   for(decltype(+blockSize) i=0; i<blockSize; i++) {
+   for(auto i=0; i<blockSize; i++) {
       r->buf[i][0] = r->leftBuffer[i];
       r->buf[i][1] = r->rightBuffer[i];
    }

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];
       }

src/effects/StereoToMono.cpp

@@ -145,7 +145,7 @@ bool EffectStereoToMono::ProcessOne(int count)
       bResult &= mLeftTrack->Get((samplePtr)leftBuffer, floatSample, index, idealBlockLen);
       bResult &= mRightTrack->Get((samplePtr)rightBuffer, floatSample, index, idealBlockLen);
       const auto limit = limitSampleBufferSize( idealBlockLen, mEnd - index );
-      for (decltype(+limit) i = 0; i < limit; ++i) {
+      for (auto i = 0; i < limit; ++i) {
          index++;
          curLeftFrame = leftBuffer[i];
          curRightFrame = rightBuffer[i];

src/effects/TruncSilence.cpp

@@ -630,7 +630,7 @@ bool EffectTruncSilence::Analyze(RegionList& silenceList,
       wt->Get((samplePtr)(buffer), floatSample, *index, count);
 
       // Look for silenceList in current block
-      for (decltype(+count) i = 0; i < count; ++i) {
+      for (auto i = 0; i < count; ++i) {
          if (inputLength && ((outLength >= previewLen) || (outLength > wt->TimeToLongSamples(*minInputLength)))) {
             *inputLength = wt->LongSamplesToTime(*index + i) - wt->LongSamplesToTime(start);
             break;