Fix "extra ;" warnings on GCC

rogueviz/gobot.cpp

@@ -610,8 +610,7 @@ auto gobot_hook =
       shot_state = 2;
       }
     return false;
-    });
+    })
-    
   ;
   
 #endif

rogueviz/presentation.cpp

@@ -542,9 +542,8 @@ int runslide = arg::add3("-slides", [] {
   + arg::add3("-presangle", [] {
     arg::shift_arg_formula(angle);
     dir = 0;
-    });
+    })
   ;
-
 }
 #endif
 }