wic: round variable before converting to int

Wic uses bitbake variable ROOTFS_SIZE to set correspondent
partition size. This variable is a literal representing
float value. Wic crashes trying to convert it to int with
the error: invalid literal for int() with base 10: '10166.0'

Fixed this by converting variable to float and rounding result.
This should work for int and float literals.

(From OE-Core rev: 3479e299b5f11dfcd3f5f97c4ad3e0449f6c6d6a)

Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/lib/wic/imager/direct.py

@@ -242,7 +242,7 @@ class DirectImageCreator(BaseImageCreator):
                     rsize_bb = get_bitbake_var('ROOTFS_SIZE', image_name)
                     if rsize_bb:
                         # convert from Kb to Mb
-                        part.size = int(rsize_bb) / 1024
+                        part.size = int(round(float(rsize_bb) / 1024.))
             # need to create the filesystems in order to get their
             # sizes before we can add them and do the layout.
             # Image.create() actually calls __format_disks() to create