Don't stop paginating if no rooms match

Always show the scrollpanel otherwise we stop paginating if there
are no matching rooms in the first request (as per comment).

Fixes no freenode rooms being shown.

src/components/structures/RoomDirectory.js

@@ -554,9 +554,19 @@ module.exports = React.createClass({
             </div>;
         } else {
             const rows = this.getRows();
+            // we still show the scrollpanel, at least for now, because
+            // otherwise we don't fetch more because we don't get a fill
+            // request from the scrollpanel because there isn't one
+            let scrollpanel_content;
             if (rows.length == 0) {
-                content = <i>No rooms to show</i>;
+                scrollpanel_content = <i>No rooms to show</i>;
             } else {
+                scrollpanel_content = <table ref="directory_table" className="mx_RoomDirectory_table">
+                    <tbody>
+                        { this.getRows() }
+                    </tbody>
+                </table>;
+            }
             const ScrollPanel = sdk.getComponent("structures.ScrollPanel");
             content = <ScrollPanel ref={this.collectScrollPanel}
                 className="mx_RoomDirectory_tableWrapper"
@@ -565,14 +575,9 @@ module.exports = React.createClass({
                 startAtBottom={false}
                 onResize={function(){}}
             >
-                    <table ref="directory_table" className="mx_RoomDirectory_table">
+                { scrollpanel_content }
-                        <tbody>
-                            { this.getRows() }
-                        </tbody>
-                    </table>
             </ScrollPanel>;
         }
-        }
 
         let placeholder = 'Search for a room';
         if (this.state.network === null || this.state.network === '_matrix') {