Fix removal of multiple consecutive 'if' nodes

Despite 'if' nodes being flattened before 'if' removal, consecutive 'if'
nodes can still show up for code like the following:

  ...

  if X
  endif

  if X
  endif

  ...

_remove_ifs() failed to remove the second 'if' node, leading to a crash
e.g. when turning on show-all mode in the menuconfig in a menu with such
code (due to the unexpected 'if' node).

Stuff like the above could potentially result from 'osource's with no
matches, though I just spotted the error while looking over the code.

Fix the 'if' removal logic to properly handle consecutive 'if' nodes.

0 files changed, 0 insertions, 0 deletions