Fix: symmetry prec mismatch between real and reciprocal space lattice (deepmodeling#5623)

Author: dyzheng

source/module_cell/module_symmetry/symmetry.cpp

@@ -423,7 +423,7 @@ int Symmetry::standard_lat(
 
     Symm_Other::right_hand_sense(a, b, c);
 	ModuleBase::GlobalFunc::ZEROS(cel_const, 6);
-	const double small = 1.0e-5;
+	const double small = PARAM.inp.symmetry_prec;
 
 	//---------------------------	
 	// 1. alpha == beta == gamma 

source/module_cell/module_symmetry/symmetry_basic.cpp

@@ -73,7 +73,7 @@ double Symmetry_Basic::check_diff(const double& x1, const double& x2)const
 	double diff = x1 - x2;
 	diff = fmod(diff + 100,1);
 	//for reasons of safety
-	if(fabs(diff - 1.0) < epsilon * 0.5)
+	if(fabs(diff - 1.0) < epsilon)
 	{
 		diff = 0;
 	}