vim-patch:7.4.337

Problem:    When there is an error preparing to edit the command line, the
            command won't be executed. (Hirohito Higashi)
Solution:   Reset did_emsg before editing.

https://code.google.com/p/vim/source/detail?r=v7-4-337

src/nvim/ex_getln.c

@@ -287,6 +287,14 @@ getcmdline (
 
   do_digraph(-1);               /* init digraph typeahead */
 
+  // If something above caused an error, reset the flags, we do want to type
+  // and execute commands. Display may be messed up a bit.
+  if (did_emsg) {
+    redrawcmd();
+  }
+  did_emsg = FALSE;
+  got_int = FALSE;
+
   /*
    * Collect the command string, handling editing keys.
    */