preproc.c: get_ctx() can return NULL...

Handle the case where we would attempt to look up a possible local
context just to find that one doesn't exist.

1 files changed, 4 insertions, 5 deletions

diff --git a/preproc.c b/preproc.c
index fe9a67e1..482d6af2 100644
--- a/preproc.c
+++ b/preproc.c
@@ -3061,14 +3061,13 @@ again:
 
         if ((mname = tline->text)) {
             /* if this token is a local macro, look in local context */
+	    ctx = NULL;
+	    smtbl = &smacros;
             if (tline->type == TOK_ID || tline->type == TOK_PREPROC_ID) {
                 ctx = get_ctx(mname, true);
-		smtbl = &ctx->localmac;
-	    } else {
-                ctx = NULL;
-		smtbl = &smacros;
+		if (ctx)
+		    smtbl = &ctx->localmac;
 	    }
-
 	    head = (SMacro *) hash_findix(smtbl, mname);
 
             /*