[OE-core] [wic][PATCH] wic: Use __file__ instead of sys.argv[0]

[Ed Bartosh]

Using __file__ makes the code work independently of the way
it's loaded. In some cases wic can be imported by another
program without executing it. sys.argv[0] would not contain
path to the wic in such a cases.

This is an enabler for unit testing with nose framework.

Signed-off-by: Ed Bartosh <ed.bartosh at linux.intel.com>
---
 scripts/wic | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/wic b/scripts/wic
index dcf1a55..fd4a678 100755
--- a/scripts/wic
+++ b/scripts/wic
@@ -38,7 +38,7 @@ import optparse
 import logging
 
 # External modules
-scripts_path = os.path.abspath(os.path.dirname(os.path.abspath(sys.argv[0])))
+scripts_path = os.path.abspath(os.path.dirname(__file__))
 lib_path = scripts_path + '/lib'
 bitbake_path = os.path.join(scripts_path, '../bitbake/lib')
 sys.path = sys.path + [lib_path, bitbake_path]
-- 
2.1.4