Use Spidermonkey's JS_ValueToECMAUint32() rather than our own

JS_ValueToUint32() for converting to integers where we may need the full 32
bits.

src/sbbs3/js_msgbase.c

@@ -58,16 +58,6 @@ typedef struct
 
 } privatemsg_t;
 
-JSBool JS_ValueToUint32(JSContext *cx, jsval v, uint32 *ip)
-{
-	jsdouble d;
-
-	if(!JS_ValueToNumber(cx, v, &d))
-		return JS_FALSE;
-	*ip = (uint32)d;
-	return JS_TRUE;
-}
-
 /* Destructor */
 
 static void js_finalize_msgbase(JSContext *cx, JSObject *obj)
@@ -842,7 +832,7 @@ static BOOL parse_header_object(JSContext* cx, private_t* p, JSObject* hdr, smbm
 	prop_name = "columns";
 	hfield_type = SMB_COLUMNS;
 	if(JS_GetProperty(cx, hdr, prop_name, &val) && !JSVAL_NULL_OR_VOID(val)) {
-		if(!JS_ValueToUint32(cx, val, &u32)) {
+		if(!JS_ValueToECMAUint32(cx, val, &u32)) {
 			JS_ReportError(cx, "Invalid \"%s\" number in header object", prop_name);
 			goto err;
 		}
@@ -868,7 +858,7 @@ static BOOL parse_header_object(JSContext* cx, private_t* p, JSObject* hdr, smbm
 			msg->idx.votes=msg->hdr.votes;
 	}
 	if(JS_GetProperty(cx, hdr, "auxattr", &val) && !JSVAL_NULL_OR_VOID(val)) {
-		if(!JS_ValueToUint32(cx,val,&u32))
+		if(!JS_ValueToECMAUint32(cx,val,&u32))
 			goto err;
 		msg->hdr.auxattr=u32;
 	}