Game Configurations: fixed a crash when no default values for UDMF integer or ...

Game Configurations: fixed a crash when no default values for UDMF integer or  floating point fields are set

Source/Core/Types/FloatHandler.cs

@@ -52,7 +52,7 @@ namespace CodeImp.DoomBuilder.Types
 
 		public override void SetupField(TypeHandlerAttribute attr, UniversalFieldInfo fieldinfo)
 		{
-			defaultvalue = fieldinfo == null ? 0.0 : (double)fieldinfo.Default;
+			defaultvalue = (fieldinfo == null || fieldinfo.Default == null) ? 0.0 : (double)fieldinfo.Default;
 			base.SetupField(attr, fieldinfo);
 		}
 

Source/Core/Types/IntegerHandler.cs

@@ -53,7 +53,7 @@ namespace CodeImp.DoomBuilder.Types
 
 		public override void SetupField(TypeHandlerAttribute attr, UniversalFieldInfo fieldinfo)
 		{
-			defaultvalue = fieldinfo == null ? 0 : (int)fieldinfo.Default;
+			defaultvalue = (fieldinfo == null || fieldinfo.Default == null) ? 0 : (int)fieldinfo.Default;
 			base.SetupField(attr, fieldinfo);
 		}