fixes issue 643 + make a copy of module name for error msg b/c unloaded
fixes issue 643
+ make a copy of module name for error msg b/c unloaded

git-svn-id: ed337ca7cdb08c0ba29d8fe58632bb7686892c2d@1202 49cc7528-f6fd-11dd-9d1a-b59b2e1864b6

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