fixed some displays

FlippR-Driver/src/output/OutputDriverFactory.cpp

@@ -15,6 +15,10 @@
 #include "output/impl/DriverBoardPinController.h"
 #include "output/impl/SoundBoardPinController.h"
 
+#include "output/items/impl/EightDigitDisplay.h"
+#include "output/items/impl/SevenDigitDisplay.h"
+
+
 namespace flippR_driver
 {
 namespace output
@@ -280,6 +284,14 @@ std::shared_ptr<items::Display> create_display(nlohmann::json &display_json)
     {
       return std::make_shared<items::impl::EightDigitDisplay>(address, id);
     }
+    else if(digits == 7)
+    {
+      return std::make_shared<items::impl::SevenDigitDisplay(address, id);
+    }
+    else
+    {
+      throw new std::logic_error("Display digits can either be 7 or 8");
+    }
 
   }
   catch(json::exception &e)