Magick++/lib/Options.cpp: remove redundant assignment (#1328)

Magick++/lib/Options.cpp: remove redundant assignment (#1328)

found by PVS analyzer

Magick++/lib/Options.cpp        804     warn    V519 The 'affine.tx' variable is assigned values twice successively. Perhaps this is a mistake. Check lines: 801, 804.
Magick++/lib/Options.cpp        805     warn    V519 The 'affine.ty' variable is assigned values twice successively. Perhaps this is a mistake. Check lines: 802, 805.
Magick++/lib/Options.cpp        838     warn    V519 The 'affine.sx' variable is assigned values twice successively. Perhaps this is a mistake. Check lines: 831, 838.
Magick++/lib/Options.cpp        839     warn    V519 The 'affine.rx' variable is assigned values twice successively. Perhaps this is a mistake. Check lines: 832, 839.
Magick++/lib/Options.cpp        840     warn    V519 The 'affine.ry' variable is assigned values twice successively. Perhaps this is a mistake. Check lines: 833, 840.
Magick++/lib/Options.cpp        841     warn    V519 The 'affine.sy' variable is assigned values twice successively. Perhaps this is a mistake. Check lines: 834, 841.
Magick++/lib/Options.cpp        864     warn    V519 The 'affine.sx' variable is assigned values twice successively. Perhaps this is a mistake. Check lines: 857, 864.
Magick++/lib/Options.cpp        865     warn    V519 The 'affine.sy' variable is assigned values twice successively. Perhaps this is a mistake. Check lines: 860, 865.
Magick++/lib/Options.cpp        888     warn    V519 The 'affine.sx' variable is assigned values twice successively. Perhaps this is a mistake. Check lines: 881, 888.
Magick++/lib/Options.cpp        889     warn    V519 The 'affine.ry' variable is assigned values twice successively. Perhaps this is a mistake. Check lines: 883, 889.
Magick++/lib/Options.cpp        890     warn    V519 The 'affine.sy' variable is assigned values twice successively. Perhaps this is a mistake. Check lines: 884, 890.
Magick++/lib/Options.cpp        913     warn    V519 The 'affine.sx' variable is assigned values twice successively. Perhaps this is a mistake. Check lines: 906, 913.
Magick++/lib/Options.cpp        914     warn    V519 The 'affine.rx' variable is assigned values twice successively. Perhaps this is a mistake. Check lines: 907, 914.
Magick++/lib/Options.cpp        915     warn    V519 The 'affine.sy' variable is assigned values twice successively. Perhaps this is a mistake. Check lines: 909, 915.