erp5_production_planning: fix copy issue from windows

bt5/erp5_production_planning/SkinTemplateItem/portal_skins/erp5_production_planning/production_planning.js.js

@@ -132,7 +132,16 @@ function listenToInputPaste(matrixbox_container) {
     e.stopPropagation();
     e.preventDefault();
     pasted_value = pasted_value.split('\n');
+    //libre office add "" at last line
+    if (pasted_value[pasted_value.length - 1] == '') {
+      pasted_value = pasted_value.slice(0, -1);
+    }
     for (i = 0; i < pasted_value.length; i += 1) {
+      length = pasted_value[i].length;
+      //in windows, '\r' is added in the end of each line, remove it
+      if (pasted_value[i][pasted_value[i].length -1] == '\r') {
+        pasted_value[i] = pasted_value[i].slice(0, -1);
+      }
       value_list = pasted_value[i].split(/\s+/);
       tr = matrixbox.find('tr:eq(' + (tr_index + i) + ')');
       for (j = 0; j < value_list.length; j += 1) {