From: Ingo Ruhnke <grumbel@gmx.de>
Date: Fri, 6 Mar 2009 01:56:24 +0000 (+0000)
Subject: Check that the userdata pointer is not null, which happens when a user creates a... 
X-Git-Url: https://git.octo.it/?p=supertux.git;a=commitdiff_plain;h=4eff38d2a777e7a889428eadbef0d1eae7d35db0

Check that the userdata pointer is not null, which happens when a user creates a C++ class himself on the Squirrel side via the constructor (i.e. a <- GameObject())

SVN-Revision: 5845
---

diff --git a/tools/miniswig/create_wrapper.cpp b/tools/miniswig/create_wrapper.cpp
index a31663166..29f35b2a1 100644
--- a/tools/miniswig/create_wrapper.cpp
+++ b/tools/miniswig/create_wrapper.cpp
@@ -304,7 +304,7 @@ WrapperCreator::create_function_wrapper(Class* _class, Function* function)
     // retrieve pointer to class instance
     if(_class != 0 && function->type != Function::CONSTRUCTOR) {
         out << ind << "SQUserPointer data;\n";
-        out << ind << "if(SQ_FAILED(sq_getinstanceup(vm, 1, &data, 0))) {\n";
+        out << ind << "if(SQ_FAILED(sq_getinstanceup(vm, 1, &data, 0)) || !data) {\n";
         out << ind << ind << "sq_throwerror(vm, _SC(\"'" << function->name << "' called without instance\"));\n";
         out << ind << ind << "return SQ_ERROR;\n";
         out << ind << "}\n";