Bug Fixes in Graphics
fix compilation under ARM device.
qReal translate to different types on different architectures.
Consensus is that the current state of affairs will be kept for qt 5.0
Luckily the function affected "SearchFieldRangeInt" is only used to
store exposure times  where 6 precision digit suffice.
So we add functions to write <float> and cast to <qReal> where needed
and be done with that.
 ChangeLog 2008-07-07 For use with the exposuretime field ...
P.S. CustomStepsDoubleSpinBox could be converted to
CustomStepsFloatSpinBox but seem not worth the effort.
Marcel hope you're ok with this