TabFind: Change order of initialization code

This fixes a compiler warning:

warning: ‘tesseract::TabFind::v_it_’ will be initialized after [-Wreorder]
warning:   ‘ICOORD tesseract::TabFind::image_origin_’ [-Wreorder]

Signed-off-by: Stefan Weil <sw@weilnetz.de>

src/textord/tabfind.cpp

@@ -67,8 +67,8 @@ TabFind::TabFind(int gridsize, const ICOORD& bleft, const ICOORD& tright,
                  int resolution)
   : AlignedBlob(gridsize, bleft, tright),
     resolution_(resolution),
-    v_it_(&vectors_),
-    image_origin_(0, tright.y() - 1) {
+    image_origin_(0, tright.y() - 1),
+    v_it_(&vectors_) {
   width_cb_ = nullptr;
   v_it_.add_list_after(vlines);
   SetVerticalSkewAndParellelize(vertical_x, vertical_y);