add support for writing all the fixed types into variable length fields (fixes #3181334)

git-svn-id: https://svn.code.sf.net/p/jackcess/code/jackcess/trunk@511 f203690c-595d-4dc9-a70b-905162fa7fd2

src/java/com/healthmarketscience/jackcess/Column.java

@@ -1079,7 +1079,7 @@ public class Column implements Comparable<Column> {
       return ByteBuffer.wrap(((RawData)obj).getBytes());
     }
 
-    if(!isVariableLength()) {
+    if(!isVariableLength() || !getType().isVariableLength()) {
       return writeFixedLengthField(obj, order);
     }