Fixed: correctly calculate symbol-name lengths.

Even though the grammar promises us the symbol names will never occupy
more than one byte per character, it's good practice to add this anyway
(since we already do it for the data table).

ssc/symbol table.cs

@@ -37,7 +37,7 @@ namespace arookas
 				writer.WriteS32(0);
 				writer.WriteS32(0);
 
-				ofs += sym.Name.Length + 1; // include null terminator
+				ofs += writer.Encoding.GetByteCount(sym.Name) + 1; // include null terminator
 			}
 			foreach (var sym in this)
 			{