binascii: Add required argument to <int>.to_bytes(...) call.

The <int>.to_bytes(...) function requires two arguments.  The first
specifies the number of bytes to return, and the second specifies the
endianness of those bytes.  By definition, Base64 encoding is big
endian.

binascii/binascii.py

@@ -68,7 +68,7 @@ def a2b_base64(ascii):
             #
             if leftbits >= 8:
                 leftbits -= 8
-                res.append((leftchar >> leftbits).to_bytes(1))
+                res.append((leftchar >> leftbits).to_bytes(1, 'big'))
                 leftchar &= ((1 << leftbits) - 1)
             #
             last_char_was_a_pad = False

binascii/metadata.txt

@@ -1,3 +1,3 @@
 srctype=pypy
 type=module
-version = 2.4.0-4
+version = 2.4.0-5

binascii/setup.py

@@ -7,7 +7,7 @@ sys.path.append("..")
 import optimize_upip
 
 setup(name='micropython-binascii',
-      version='2.4.0-4',
+      version='2.4.0-5',
       description='PyPy binascii module ported to MicroPython',
       long_description='This is a module ported from PyPy standard library to be compatible with\nMicroPython interpreter. Usually, this means applying small patches for\nfeatures not supported (yet, or at all) in MicroPython. Sometimes, heavier\nchanges are required. Note that CPython modules are written with availability\nof vast resources in mind, and may not work for MicroPython ports with\nlimited heap. If you are affected by such a case, please help reimplement\nthe module from scratch.',
       url='https://github.com/micropython/micropython-lib',