gridfixes: impl_ni_calculateColumnWidths: re-calculate the proper values

for distributePixel/takeAwayPixel before finally using it to correct
the rounding errors

Change-Id: I6f3b178400db0696df0289331be94d69f1d4f0d2
Reviewed-on: https://gerrit.libreoffice.org/555Reviewed-by: Miklos Vajna <vmiklos@suse.cz>
Tested-by: Miklos Vajna <vmiklos@suse.cz>

svtools/source/table/tablecontrol_impl.cxx

@@ -1069,6 +1069,7 @@ namespace svt { namespace table
                 while ( startOver );
 
                 // are there pixels left (might be caused by rounding errors)?
+                distributePixel = gridWidthPixel - ::std::accumulate( o_newColWidthsPixel.begin(), o_newColWidthsPixel.end(), 0 );
                 while ( ( distributePixel > 0 ) && ( flexibleColumnCount > 0 ) )
                 {
                     // yes => ignore relative flexibilities, and subsequently distribute single pixels to all flexible
@@ -1143,6 +1144,7 @@ namespace svt { namespace table
                 while ( startOver );
 
                 // are there pixels left (might be caused by rounding errors)?
+                takeAwayPixel = ::std::accumulate( o_newColWidthsPixel.begin(), o_newColWidthsPixel.end(), 0 ) - gridWidthPixel;
                 while ( ( takeAwayPixel > 0 ) && ( flexibleColumnCount > 0 ) )
                 {
                     // yes => ignore relative flexibilities, and subsequently take away pixels from all flexible