Fix storing incomplete game uuid on /save

Previously the formatted game uuid was cut off after 15 bytes.
Therefore only 52 out of 128 bit of the uuid were stored.

introduced in 69fd7f1767

src/engine/shared/uuid_manager.h

@@ -23,6 +23,7 @@ struct CUuid
 
 CUuid RandomUuid();
 CUuid CalculateUuid(const char *pName);
+// The buffer length should be at least UUID_MAXSTRSIZE.
 void FormatUuid(CUuid Uuid, char *pBuffer, unsigned BufferLength);
 
 struct CName

src/game/server/save.h

@@ -85,7 +85,7 @@ private:
 	int m_HookTick;
 	int m_HookState;
 
-	char aGameUuid[16];
+	char aGameUuid[UUID_MAXSTRSIZE];
 };
 
 class CSaveTeam