Body expressions like

if(!(foo[i] instanceof Serializable))

and

if(!foo[i])

are catched by the isAssigned(ASTNode current) test and because of this
not considered.
Because of this some loops are not recognized by the
enhanced for loop quickfix. This patch changes it.

Change-Id: I737b27a53e85fb72e745c63a0c2758161c673092
Signed-off-by: Carsten Hammer <carsten.hammer@t-online.de>