[src, nnet3] fix declaration of GetDiscriminativeNnetExampleSize and GetNnetChainExampleSize (#4685)

* [src, nnet3] fix declartion of
    GetDiscriminativeNnetExampleSize and GetNnetChainExampleSize

* [src,nnet3] Fix a bug that the function declaration of MergeDiscriminativeExamples does not match its definition.

Author: ahban

src/nnet3/nnet-chain-example.h

@@ -226,7 +226,7 @@ typedef RandomAccessTableReader<KaldiObjectHolder<NnetChainExample > > RandomAcc
 /// This function returns the 'size' of a chain example as defined for purposes
 /// of merging egs, which is defined as the largest number of Indexes in any of
 /// the inputs or outputs of the example.
-int32 GetChainNnetExampleSize(const NnetChainExample &a);
+int32 GetNnetChainExampleSize(const NnetChainExample &a);
 
 
 /// This class is responsible for arranging examples in groups that have the

src/nnet3/nnet-discriminative-example.h

@@ -167,8 +167,8 @@ struct NnetDiscriminativeExampleStructureCompare {
   MergeExamples() routine while avoiding having to rewrite code.
 */
 void MergeDiscriminativeExamples(
-    std::vector<NnetDiscriminativeExample> *input,
     bool compress,
+    std::vector<NnetDiscriminativeExample> *input,
     NnetDiscriminativeExample *output);
 
 // called from MergeDiscriminativeExamples, this function merges the Supervision
@@ -219,7 +219,7 @@ typedef RandomAccessTableReader<KaldiObjectHolder<NnetDiscriminativeExample > >
 /// This function returns the 'size' of a discriminative example as defined for
 /// purposes of merging egs, which is defined as the largest number of Indexes
 /// in any of the inputs or outputs of the example.
-int32 GetDiscriminativeNnetExampleSize(const NnetDiscriminativeExample &a);
+int32 GetNnetDiscriminativeExampleSize(const NnetDiscriminativeExample &a);
 
 
 /// This class is responsible for arranging examples in groups that have the