autocomplete crash fix on CTRL without available variants

Author: nikitaeverywhere

webSource/js/TerminalInput.js

@@ -226,7 +226,7 @@ TerminalInput.prototype.getCurrentAutocompleteVariant = function () {
 TerminalInput.prototype._changeAutocompleteVariant = function (delta) {
 
     this._currentAutocompleteVariant = (this._currentAutocompleteVariant + delta)
-        % this._autocompleteVariants.length;
+        % this._autocompleteVariants.length || 0;
     if (this._currentAutocompleteVariant < 0) this._currentAutocompleteVariant
         += this._autocompleteVariants.length;
     this._updateAutocompleteView();
@@ -243,6 +243,8 @@ TerminalInput.prototype._updateAutocompleteView = function () {
 
     var variant = this.getCurrentAutocompleteVariant();
 
+    console.log(variant, this._autocompleteHint);
+
     if (!variant) {
         this._autocompleteHint.hide();
         return;