Fix terrible python goof in clang-format.py which broke my vim

integration.

Nothing is more important in life than clang-format integration with
vim. ;]

llvm-svn: 239098

clang/tools/clang-format/clang-format.py

@@ -85,7 +85,7 @@ def main():
     for op in reversed(sequence.get_opcodes()):
       if op[0] is not 'equal':
         vim.current.buffer[op[1]:op[2]] = lines[op[3]:op[4]]
-    if output['IncompleteFormat']:
+    if output.get('IncompleteFormat'):
       print 'clang-format: incomplete (syntax errors)'
     vim.command('goto %d' % (output['Cursor'] + 1))