VertexFitter: fix clang warnings
Fixes the warnings
Phys/LoKiFitters/src/VertexFitter.cpp:194:10: warning: using integer absolute value function 'abs' when argument is of floating point type [-Wabsolute-value]
if ( abs ( d2 ) < std::min ( m_DistanceChi2 , 0.01 ) || s_equal ( d2 , 0 ) )
^
Phys/LoKiFitters/src/VertexFitter.cpp:194:10: note: use function 'std::abs' instead
if ( abs ( d2 ) < std::min ( m_DistanceChi2 , 0.01 ) || s_equal ( d2 , 0 ) )
^~~
std::abs
Phys/LoKiFitters/src/VertexFitter.cpp:658:10: warning: using integer absolute value function 'abs' when argument is of floating point type [-Wabsolute-value]
if ( abs ( chi2 ) < std::min ( m_DistanceChi2 , 0.01 ) || s_equal ( chi2 , 0 ) )
^
Phys/LoKiFitters/src/VertexFitter.cpp:658:10: note: use function 'std::abs' instead
if ( abs ( chi2 ) < std::min ( m_DistanceChi2 , 0.01 ) || s_equal ( chi2 , 0 ) )
^~~
std::abs