REVERT: Reset the view only if dimensions really change.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25575 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Fixing Singular code when no variables given

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25576 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e