Fix itemChanged signal signature in blacklist.ui

Author: g1itch

src/bitmessageqt/blacklist.ui

@@ -166,7 +166,7 @@
   </connection>
   <connection>
    <sender>tableWidgetBlacklist</sender>
-   <signal>itemChanged(QTableWidgetItem)</signal>
+   <signal>itemChanged(QTableWidgetItem*)</signal>
    <receiver>blacklist</receiver>
    <slot>tableWidgetBlacklistItemChanged</slot>
   </connection>