coverity#1250404 Operands don't affect result

trying to auto-ignore this one, so don't touch it manually in the UI so I can
experiment if this syntax will correctly auto-triage in all coverity instances

Change-Id: I4ae42a6828041f40c6ab8cb3cfc631c8dd38e8c8

tools/source/generic/fract.cxx

@@ -63,6 +63,7 @@ Fraction::Fraction( double dVal )
 
 bool Fraction::HasOverflowValue()
 {
+    //coverity[constant_expression_result]
     return value.numerator() < std::numeric_limits<long>::min() ||
         value.numerator() > std::numeric_limits<long>::max() ||
         value.denominator() < std::numeric_limits<long>::min() ||