Fixed bug in filesystem with file path searching

Bug was introduced with b83da98

This commit fixes possible issues with file path search and, in
particular, crash in Clear Sky with log:
ERROR: There are no sound collection with path:
characters_voice\scenario\agroprom\agr_base_commander_reward_pda

This is another 3 year old bug!!!
Those "refactoring" commits made by me in 2017-2018 should be totally
reviewed!

src/xrCore/LocatorAPI.cpp

@@ -405,7 +405,7 @@ void CLocatorAPI::LoadArchive(archive& A, pcstr entrypoint)
                 // R_ASSERT3 (root, "path not found ", read_path.c_str());
                 xr_strcpy(fs_entry_point, sizeof fs_entry_point, root->m_Path);
             }
-            xr_strcat(fs_entry_point, "gamedata//");
+            xr_strcat(fs_entry_point, "gamedata" DELIMITER);
         }
         else
         {