modules/vidjil_utils.py fix inverted disk space test

check for available disk space test was wrong and returning the opposite
of the desired result

server/web2py/applications/vidjil/modules/vidjil_utils.py

@@ -418,9 +418,9 @@ def check_enough_space(directory):
     device, size, used, available, percent, mountpoint = output.split("\n")[1].split()
     available = int(available)
     size = int(size)
-    result = available < (size * (defs.FS_LOCK_THRESHHOLD/100))
     if not result:
         mail.send(to=defs.ADMIN_EMAILS,
             subject="[Vidjil] Server space",
             message="The space in directory %s has passed below %d\%." % directory, defs.FS_LOCK_THRESHHOLD)
+    result = available >= (size * (defs.FS_LOCK_THRESHHOLD/100))
     return result