fix windows build

Author: dhthwy

library/SDLConsole_impl.cpp

@@ -2626,10 +2626,10 @@ class OutputPane : public Widget {
             step = -1;
             break;
         case ScrollAction::page_up:
-            step = (int)rows();
+            step = int(rows());
             break;
         case ScrollAction::page_down:
-            step = (int)-rows();
+            step = -int(rows());
             break;
         }