fixes issue 608 + only update prev_e in hashtable_remove_range when not freeing e
fixes issue 608
+ only update prev_e in hashtable_remove_range when not freeing e

git-svn-id: ed337ca7cdb08c0ba29d8fe58632bb7686892c2d@1149 49cc7528-f6fd-11dd-9d1a-b59b2e1864b6

rnk/dynamorio,rnk/dynamorio,rnk/dynamorio,rnk/dynamorio,rnk/dynamorio