Fix build

BurnOutSharp/EVORE.cs

@@ -38,7 +38,7 @@ namespace BurnOutSharp
         private static Process StartSafe(string file)
         {
             if (file == null)
-                return string.Empty;
+                return null;
 
             Process startingprocess = new Process();
             startingprocess.StartInfo.FileName = file;

BurnOutSharp/ProtectionType/ProtectDisc.cs

@@ -92,6 +92,7 @@ namespace BurnOutSharp.ProtectionType
 
         private static string GetVersionBuild76till10(string file, int position, out int irefBuild)
         {
+            irefBuild = 0;
             if (file == null)
                 return string.Empty;