getCastHelper and NULL type

git-svn-id: https://svn.code.sf.net/p/jode/code/trunk@792 379699f6-c40d-0410-875b-85095c16579e

jode/jode/type/ArrayType.java

@@ -175,6 +175,8 @@ public class ArrayType extends ReferenceType {
      * @return the middle type, or null if it is not necessary.
      */
     public Type getCastHelper(Type fromType) {
+	if (fromType.getTypeCode() == TC_NULL)
+	    return this;
 	Type hintType = fromType.getHint();
 	switch (hintType.getTypeCode()) {
 	case TC_ARRAY:

jode/jode/type/ClassInterfacesType.java

@@ -435,6 +435,8 @@ public class ClassInterfacesType extends ReferenceType {
      * @return the middle type, or null if it is not necessary.
      */
     public Type getCastHelper(Type fromType) {
+	if (fromType.getTypeCode() == TC_NULL)
+	    return this;
 	Type hintType = fromType.getHint();
 	switch (hintType.getTypeCode()) {
 	case TC_ARRAY: