AWI for Alban Rochel:
AWI for Alban Rochel:

Due to the issues related to dynamic_casts, and as those were only used to
make the code compacter, change the way the driver works as follows:
- Before: 1 callback function common to all Qt devices (e.g. plD_line_qt),
calling the proper implementations making tests on the results of
dynamic_casts
- After: 1 callback function for every Qt device (e.g. plD_line_svgqt),
using simple C-style casts.


svn path=/trunk/; revision=10168

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