Fix fontification of C++ declaration with type FOO::FOO.

* lisp/progmodes/cc-engine.el (c-find-decl-spots): Initialize
cfd-top-level properly.
(c-forward-decl-or-cast-1): On finding FOO::FOO, check it is followed by "("
before deciding it is a constructor.

* lisp/progmodes/cc-fonts.el (c-font-lock-complex-decl-prepare): Negate the
result of the c-bs-at-toplevel-p call passed to c-font-lock-declarators
(simple bug fix).

lisp/progmodes/cc-engine.el

@@ -5681,7 +5681,7 @@ comment at the start of cc-engine.el for more info."
 	;; Whether the last position returned from `c-find-decl-prefix-search'
 	;; is at the top-level (including directly in a class or namespace,
 	;; etc.).
-	cfd-top-level)
+	(cfd-top-level (c-bs-at-toplevel-p (point))))
 
     ;; Initialize by finding a syntactically relevant start position
     ;; before the point, and do the first `c-decl-prefix-or-start-re'
@@ -8379,7 +8379,11 @@ comment at the start of cc-engine.el for more info."
 		   (c-simple-skip-symbol-backward))
 		 (>= (point) type-start)
 		 (equal (buffer-substring-no-properties (point) end-1)
-			name))
+			name)
+		 (goto-char end-2)
+		 (progn
+		   (c-forward-syntactic-ws)
+		   (eq (char-after) ?\()))
 	    ;; It is a (con|de)structor name.  In that case the
 	    ;; declaration is typeless so zap out any preceding
 	    ;; identifier(s) that we might have taken as types.

lisp/progmodes/cc-fonts.el

@@ -900,7 +900,7 @@ casts and declarations are fontified.  Used on level 2 and higher."
     (when (memq prop '(c-decl-id-start c-decl-type-start))
       (c-forward-syntactic-ws limit)
       (c-font-lock-declarators limit t (eq prop 'c-decl-type-start)
-			       (c-bs-at-toplevel-p (point)))))
+			       (not (c-bs-at-toplevel-p (point))))))
 
   (setq c-font-lock-context ;; (c-guess-font-lock-context)
 	(save-excursion