JavaScriptCore: ConvertPtr should allow JavaScript null to be a valid value.

It is common in C to accept NULL to functions for pointer parameters.
extern void DoSomething(struct Foo* foo);
...
DoSomething(NULL);

Thus, JavaScript null should be allowed:
module.DoSomething(null);

But the current ConvertPtr definition accepts only objects. This modifies it to allow null.

1 files changed, 7 insertions, 0 deletions

diff --git a/Lib/javascript/jsc/javascriptrun.swg b/Lib/javascript/jsc/javascriptrun.swg
index 813c7deb4..9655b0eb6 100644
--- a/Lib/javascript/jsc/javascriptrun.swg
+++ b/Lib/javascript/jsc/javascriptrun.swg
@@ -129,6 +129,13 @@ SWIGRUNTIME int SWIG_JSC_ConvertInstancePtr(JSContextRef context, JSObjectRef ob
 
 SWIGRUNTIME int SWIG_JSC_ConvertPtr(JSContextRef context, JSValueRef valRef, void** ptr, swig_type_info *info, int flags) {
   JSObjectRef objRef;
+
+  /* special case: JavaScript null => C NULL pointer */
+  if(JSValueIsNull(context, valRef)) {
+    *ptr=0;
+    return SWIG_OK;
+  }
+  
   if(!JSValueIsObject(context, valRef)) {
     return SWIG_TypeError;
   }