mitab_spatialref.cpp - default GEOCS uses atof and has locale problems, fix proposed

[nicolaslelong]

In method TABFile::GetSpatialRef, on line 1037, the following statement uses atof to convert the SRS_UA_DEGREE_CONV string to double.

    m_poSpatialRef->SetGeogCS( "unnamed",
                               szDatumName,
                               pszSpheroidName,
                               dfSemiMajor, dfInvFlattening,
                               pszPMName, dfPMOffset,
                               SRS_UA_DEGREE, atof(SRS_UA_DEGREE_CONV));

This causes problems when the current locale has not "." as the decimal separator (results in 0 instead of 0.0174532925199433)

Fix ::

Simply replacing atof with CPLAtof solves the problem.