Save empty strings as 'CIRILLA_EMPTY_STRING'

This doesn't change anything in the GMD loading code, it only changes how Cirilla.Core saves empty strings added by the user.

Author: Fusion86

Cirilla.Core/Cirilla.Core.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <TargetFramework>netstandard2.0</TargetFramework>
-    <Version>0.0.4</Version>
+    <Version>0.0.4.1</Version>
     <Authors>Fusion86</Authors>
     <Company />
   </PropertyGroup>

Cirilla.Core/Models/GMD.cs

@@ -160,10 +160,16 @@ public void Save(string path)
 
                 foreach (var item in Strings)
                 {
-                    if (item == null) continue;
-
-                    bw.Write(ExEncoding.UTF8.GetBytes(item));
-                    bw.Write((byte)0); // szString end of string
+                    if (String.IsNullOrEmpty(item))
+                    {
+                        bw.Write(ExEncoding.UTF8.GetBytes("CIRILLA_EMPTY_STRING"));
+                        bw.Write((byte)0); // szString end of string
+                    }
+                    else
+                    {
+                        bw.Write(ExEncoding.UTF8.GetBytes(item));
+                        bw.Write((byte)0); // szString end of string
+                    }
                 }
             }