Remove reference to stderr

plugins/amoeba/platforms/reference/src/SimTKReference/AmoebaReferenceMultipoleForce.cpp

@@ -30,7 +30,7 @@
 using std::vector;
 using OpenMM::RealVec;
 
-#define AMOEBA_DEBUG
+//#define AMOEBA_DEBUG
 
 AmoebaReferenceMultipoleForce::AmoebaReferenceMultipoleForce( ) : _nonbondedMethod(NoCutoff) {
     initialize();
@@ -166,6 +166,7 @@ void AmoebaReferenceMultipoleForce::loadArrayFromVector( unsigned int particleI,
 void AmoebaReferenceMultipoleForce::logRealOpenMMVectors( const std::string& header, const VectorOfRealOpenMMVectors& printVector,
                                                           FILE* log, unsigned int itemsPerVector, int maxPrint ) const {
 
+    if( log ){
         (void) fprintf( log, "%s", header.c_str() );
         for( unsigned int ii = 0; ii < printVector[0].size()/itemsPerVector; ii++ ){
             (void) fprintf( log, "%5u ", ii );
@@ -182,6 +183,7 @@ void AmoebaReferenceMultipoleForce::logRealOpenMMVectors( const std::string& hea
             }
             (void) fprintf( log, "\n" );
         }
+    }
 }
 
 void AmoebaReferenceMultipoleForce::logParticleData( const std::string& header, const std::vector<MultipoleParticleData>& particleData,

plugins/amoeba/platforms/reference/src/SimTKReference/AmoebaReferenceMultipoleForce.h

@@ -360,7 +360,7 @@ private:
     void addField( unsigned int particleIOffset, int sign, RealOpenMM field[3], std::vector<RealOpenMM>& vectorToAddTo ) const;
 
     void logRealOpenMMVectors( const std::string& header, const VectorOfRealOpenMMVectors& printVector,
-                               FILE* log = stderr, unsigned int itemsPerVector = 1, int maxPrint = -1 ) const;
+                               FILE* log = NULL, unsigned int itemsPerVector = 1, int maxPrint = -1 ) const;
 
     void logParticleData( const std::string& header, const std::vector<MultipoleParticleData>& particleData,
                           unsigned int printFlag, FILE* log, unsigned int maxPrint ) const;