more on conservation during phagocytosis

In response to Issue MathCancer#307, cells by default ingest 100% of internalized substrates when eating another cell.

(Note that the values for std::vector<bool> fraction_tranferred_when_ingested in Basic_Agent is *overwritten* by constructors in the cell Phenotype, so we have ot do it there.)

core/PhysiCell_cell.cpp

@@ -1399,9 +1399,10 @@ void Cell::ingest_cell( Cell* pCell_to_eat )
 		// absorb the internalized substrates 
 
 		// multiply by the fraction that is supposed to be ingested (for each substrate) 
+
 		*(pCell_to_eat->internalized_substrates) *= 
 			*(pCell_to_eat->fraction_transferred_when_ingested); // 
-		
+
 		*internalized_substrates += *(pCell_to_eat->internalized_substrates); 
 		static int n_substrates = internalized_substrates->size(); 
 		pCell_to_eat->internalized_substrates->assign( n_substrates , 0.0 ); 	
@@ -1410,6 +1411,7 @@ void Cell::ingest_cell( Cell* pCell_to_eat )
 		// so that each daughter cell gets half of the original ;
 		for( int nn = 0 ; nn < custom_data.variables.size() ; nn++ )
 		{
+			custom_data.variables[nn].conserved_quantity = true; 
 			if( custom_data.variables[nn].conserved_quantity == true )
 			{
 				custom_data.variables[nn].value += 

core/PhysiCell_phenotype.cpp

@@ -1049,7 +1049,7 @@ void Molecular::sync_to_current_microenvironment( void )
 	{
 		internalized_total_substrates.resize( 0 , 0.0 ); 
 		fraction_released_at_death.resize( 0 , 0.0 ); 
-		fraction_transferred_when_ingested.resize( 0, 0.0 ); 
+		fraction_transferred_when_ingested.resize( 0, 1.0 ); 
 	}
 	return; 
 }
@@ -1062,7 +1062,7 @@ void Molecular::sync_to_microenvironment( Microenvironment* pNew_Microenvironmen
 
 	internalized_total_substrates.resize( number_of_densities , 0.0 ); 
 	fraction_released_at_death.resize( number_of_densities , 0.0 ); 
-	fraction_transferred_when_ingested.resize( number_of_densities , 0.0 ); 
+	fraction_transferred_when_ingested.resize( number_of_densities , 1.0 ); 
 
 	return; 
 }