(calculate-c-indent): When testing for function-start line,

always match the first paren if have more than one.

1 files changed, 4 insertions, 1 deletions

diff --git a/lisp/progmodes/c-mode.el b/lisp/progmodes/c-mode.el
index b92fe6ec819..4fa70262471 100644
--- a/lisp/progmodes/c-mode.el
+++ b/lisp/progmodes/c-mode.el
@@ -569,7 +569,10 @@ Returns nil if line starts inside a string, t if in a comment."
                                 (looking-at "DEFUN\\b"))
                               c-argdecl-indent
                             (if (and (looking-at "\\sw\\|\\s_")
-                                     (looking-at "[^\"\n=]*(")
+                                     ;; This is careful to stop at the first
+                                     ;; paren if we have
+                                     ;; int foo Proto ((int, int));
+                                     (looking-at "[^\"\n=(]*(")
                                      (progn
                                        (goto-char (1- (match-end 0)))
                                        (setq lim (point))