Avoid error during upload of .msg file with attachment
Avoid error during upload of .msg file with attachment

This fixes issues #197.
dreardon/crits,DukeOfHazard/crits,cdorer/crits,jhuapl-marti/marti,jhuapl-marti/marti,cfossace/crits,0x3a/crits,korrosivesec/crits,dreardon/crits,korrosivesec/crits,kaoscoach/crits,ckane/crits,korrosivesec/crits,jinverar/crits,jinverar/crits,seanthegeek/crits,seanthegeek/crits,Magicked/crits,davidhdz/crits,HardlyHaki/crits,davidhdz/crits,seanthegeek/crits,davidhdz/crits,HardlyHaki/crits,lakiw/cripts,seanthegeek/crits,jinverar/crits,Lambdanaut/crits,jinverar/crits,ckane/crits,blaquee/crits,cdorer/crits,davidhdz/crits,HardlyHaki/crits,blaquee/crits,dreardon/crits,0x3a/crits,jhuapl-marti/marti,blaquee/crits,cfossace/crits,lakiw/cripts,DukeOfHazard/crits,cfossace/crits,DukeOfHazard/crits,cdorer/crits,Magicked/crits,seanthegeek/crits,lakiw/cripts,cfossace/crits,korrosivesec/crits,kaoscoach/crits,DukeOfHazard/crits,dreardon/crits,Lambdanaut/crits,cdorer/crits,ckane/crits,Magicked/crits,HardlyHaki/crits,ckane/crits,Lambdanaut/crits,blaquee/crits,Magicked/crits,kaoscoach/crits,lakiw/cripts,kaoscoach/crits,davidhdz/crits,Lambdanaut/crits,0x3a/crits,jhuapl-marti/marti,0x3a/crits