fixed postgres upgrade

Author: puthre

appinfo/database.xml

@@ -200,6 +200,7 @@
       <name>details</name>
       <type>text</type>
       <notnull>true</notnull>
+      <default></default>
       <length>1024</length>
     </field>
     <field>

appinfo/info.xml

@@ -5,7 +5,7 @@
     <name>Time Tracker</name>
     <summary>Time Tracker App</summary>
     <description><![CDATA[Time Tracker App]]></description>
-    <version>0.0.38</version>
+    <version>0.0.39</version>
     <licence>agpl</licence>
     <author mail="[email protected]" >MTier Ltd.</author>
     <namespace>TimeTracker</namespace>