Creating a table with NUMERIC(precision) results in error

The following command results in an error:
lss=> create table blahfive (prim NUMERIC(20));
ERROR: NUMERIC scale -1 must be between 0 and precision 20

On further investigation it was discovered that what is actually passed to a node is the following:
2011-10-07 15:33:40 IST STATEMENT: CREATE TABLE "blahfive" ("prim" NUMERIC (20, -1))
2011-10-07 15:35:07 IST ERROR: NUMERIC scale -1 must be between 0 and precision 20 at character 33

The scale parameter is being passed as -1, which is invalid.

On further investigation, I created a new NUMERIC TEMPLATE called NUMERIC_TEMPLATE_WITHOUT_SCALE, which looks like this:
Index: src/org/postgresql/stado/parser/handler/TypeConstants.java
===================================================================
--- src/org/postgresql/stado/parser/handler/TypeConstants.java (revision 6482)
+++ src/org/postgresql/stado/parser/handler/TypeConstants.java (working copy)
@@ -61,6 +61,10 @@
     public static final String NUMERIC_TEMPLATE = Property.get(
             "xdb.sqltype.numeric.map", "NUMERIC ({precision}, {scale})");

+// mike debug added for case when precision is non-zero but scale not specified
+ public static final String NUMERIC_TEMPLATE_WITHOUT_SCALE = Property.get(
+ "xdb.sqltype.numeric.map", "NUMERIC ({precision})");
+
     public static final String NUMERIC_TEMPLATE_WITHOUT_PRECISION = Property.get(
             "xdb.sqltype.numeric.map", "NUMERIC");

This was added to the data type handler like so:

Index: src/org/postgresql/stado/parser/handler/DataTypeHandler.java
===================================================================
--- src/org/postgresql/stado/parser/handler/DataTypeHandler.java (revision 6482)
+++ src/org/postgresql/stado/parser/handler/DataTypeHandler.java (working copy)
@@ -796,10 +796,17 @@
             typeString = DOUBLE_TEMPLATE;
             break;
         case Types.NUMERIC:
- if (precision == -1) {
- typeString = NUMERIC_TEMPLATE_WITHOUT_PRECISION;
- } else {
- typeString = NUMERIC_TEMPLATE;
+ if (precision == -1)
+ {
+ typeString = NUMERIC_TEMPLATE_WITHOUT_PRECISION;
+ }
+ else if (scale == -1)
+ {
+ typeString = NUMERIC_TEMPLATE_WITHOUT_SCALE;
+ }
+ else
+ {
+ typeString = NUMERIC_TEMPLATE;
          }
             break;
         case Types.TIMESTAMP:

Hoping the above is correct, thought it might be useful to report.
Mike