tdf#104227: fix subtypes DECIMAL/NUMERIC in resultset

bt here:
https://bug-attachments.documentfoundation.org/attachment.cgi?id=129298

See also https://bugs.documentfoundation.org/show_bug.cgi?id=104227#c13 for more details

Change-Id: Ied497cfff2f71e67161d541b90fe48bb3e2456b9
Reviewed-on: https://gerrit.libreoffice.org/31593Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Tamás Bunth <btomi96@gmail.com>
Reviewed-by: Julien Nabet <serval2412@yahoo.fr>

connectivity/source/drivers/firebird/ResultSet.cxx

@@ -456,17 +456,17 @@ ORowSetValue OResultSet::retrieveValue(const sal_Int32 nColumnIndex, const ISC_S
         case SQL_VARYING:
             return getString(nColumnIndex);
         case SQL_SHORT:
-            if(nSqlSubType == 0 || nSqlSubType == 1) //numeric or decimal
+            if(nSqlSubType == 1 || nSqlSubType == 2) //numeric or decimal
                 return getString(nColumnIndex);
             return getShort(nColumnIndex);
         case SQL_LONG:
-            if(nSqlSubType == 0 || nSqlSubType == 1) //numeric or decimal
+            if(nSqlSubType == 1 || nSqlSubType == 2) //numeric or decimal
                 return getString(nColumnIndex);
             return getInt(nColumnIndex);
         case SQL_FLOAT:
             return getFloat(nColumnIndex);
         case SQL_DOUBLE:
-            if(nSqlSubType == 0 || nSqlSubType == 1) //numeric or decimal
+            if(nSqlSubType == 1 || nSqlSubType == 2) //numeric or decimal
                 return getString(nColumnIndex);
             return getDouble(nColumnIndex);
         case SQL_D_FLOAT:
@@ -478,7 +478,7 @@ ORowSetValue OResultSet::retrieveValue(const sal_Int32 nColumnIndex, const ISC_S
         case SQL_TYPE_DATE:
             return getDate(nColumnIndex);
         case SQL_INT64:
-            if(nSqlSubType == 0 || nSqlSubType == 1) //numeric or decimal
+            if(nSqlSubType == 1 || nSqlSubType == 2) //numeric or decimal
                 return getString(nColumnIndex);
             return getLong(nColumnIndex);
         case SQL_BLOB: