Re-initialize the canvas only if we need to do so
Re-initialize the canvas only if we need to do so

This commit tries to skip the reinitializing of the canvas in the rendering method using the page setup set in the options without breaking compatibility or capability of dynamic calculation

nathanntg/dompdf,dompdf/dompdf,nathanntg/dompdf,BrunoDeBarros/dompdf,dompdf/dompdf,BrunoDeBarros/dompdf