bitbake: BBHandler/ConfHandler: Merge fix for multiline comments

This was meant to be squashed into the previous commit for multiline comment
handling. It fixes the case the commented multiline is followed by an empty
line which was resulting in a traceback instead of a sane error message.

(Bitbake rev: 7e7d692e244fe8dca533f842ca143b9c821e317c)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/parse/parse_py/ConfHandler.py

@@ -108,7 +108,7 @@ def handle(fn, data, include):
         while s[-1] == '\\':
             s2 = f.readline().strip()
             lineno = lineno + 1
-            if s2 and s[0] == "#" and s2[0] != "#":
+            if (not s2 or s2 and s2[0] != "#") and s[0] == "#" :
                 bb.fatal("There is a confusing multiline, partially commented expression on line %s of file %s (%s).\nPlease clarify whether this is all a comment or should be parsed." % (lineno, fn, s))
             s = s[:-1] + s2
         # skip comments