Allow share_with column to be null for links

db_structure.xml

@@ -479,7 +479,7 @@
     <name>share_with</name>
     <type>text</type>
     <default></default>
-    <notnull>true</notnull>
+    <notnull>false</notnull>
     <length>255</length>
    </field>
    

lib/util.php

@@ -76,7 +76,7 @@ class OC_Util {
 	 */
 	public static function getVersion(){
 		// hint: We only can count up. So the internal version number of ownCloud 4.5 will be 4,9,0. This is not visible to the user
-		return array(4,83,4);
+		return array(4,83,5);
 	}
 
 	/**