[Go] Don't emit a constructor function for a director class with an

abstract method, since the function will always panic.

Fixes #435.

CHANGES.current

@@ -5,6 +5,11 @@ See the RELEASENOTES file for a summary of changes in each release.
 Version 3.0.8 (in progress)
 ===========================
 
+2015-10-06: ianlancetaylor
+	    [Go] Don't emit a constructor function for a director
+	    class with an abstract method, since the function will
+	    always panic.
+
 2015-10-01: wsfulton
             Fix %shared_ptr support for private and protected inheritance.
             - Remove unnecessary Warning 520: Derived class 'Derived' of 'Base'

Source/Modules/go.cxx

@@ -785,6 +785,13 @@ private:
       return SWIG_OK;
     }
 
+    // Don't emit constructors for abstract director classes.  They
+    // will never succeed anyhow.
+    if (Swig_methodclass(n) && Swig_directorclass(n)
+	&& Strcmp(Char(Getattr(n, "wrap:action")), director_prot_ctor_code) == 0) {
+      return SWIG_OK;
+    }
+
     String *name = Getattr(n, "sym:name");
     String *nodetype = Getattr(n, "nodeType");
     bool is_static = is_static_member_function || isStatic(n);
@@ -848,8 +855,7 @@ private:
       Delete(c2);
       Delete(c1);
 
-      if (Swig_methodclass(n) && Swig_directorclass(n)
-	  && Strcmp(Char(Getattr(n, "wrap:action")), director_prot_ctor_code) != 0) {
+      if (Swig_methodclass(n) && Swig_directorclass(n)) {
 	// The core SWIG code skips the first parameter when
 	// generating the $nondirector_new string.  Recreate the
 	// action in this case.  But don't it if we are using the