upip: Update for uctype.struct() signature change.

upip/metadata.txt

@@ -1,6 +1,6 @@
 srctype = micropython-lib
 type = module
-version = 0.5.2
+version = 0.5.3
 author = Paul Sokolovsky
 extra_modules = upip__libc, upip_errno, upip_gzip, upip_os, upip_os_path, upip_stat, upip_utarfile
 desc = Simple package manager for MicroPython.

upip/setup.py

@@ -6,7 +6,7 @@ from setuptools import setup
 
 
 setup(name='micropython-upip',
-      version='0.5.2',
+      version='0.5.3',
       description='Simple package manager for MicroPython.',
       long_description='Simple package manager for MicroPython, targetting to be self-hosted (but not yet there). Compatible only with packages without custom setup.py code.',
       url='https://github.com/micropython/micropython/issues/405',

upip/upip_utarfile.py

@@ -56,7 +56,7 @@ class TarFile:
             if not buf:
                 return None
 
-            h = uctypes.struct(TAR_HEADER, uctypes.addressof(buf), uctypes.LITTLE_ENDIAN)
+            h = uctypes.struct(uctypes.addressof(buf), TAR_HEADER, uctypes.LITTLE_ENDIAN)
 
             # Empty block means end of archive
             if h.name[0] == 0: