bindings: fix segfault in QApplication_new taking arg by reference

binding.cpp

@@ -3,8 +3,9 @@
 #include <QWidget>
 #include <QPushButton>
 
-PQApplication QApplication_new(int argc, char** argv) {
-    return new QApplication(argc, argv);
+PQApplication QApplication_new(int* argc, char** argv) {
+    // QApplication takes these parameters byref, not by value
+    return new QApplication(*argc, argv);
 }
 
 PQWidget QWidget_new() {

binding.go

@@ -30,7 +30,8 @@ type QApplication struct {
 }
 
 func NewQApplication(args []string) *QApplication {
-	h := C.QApplication_new(CArray(args))
+	argc, argv := CArray(args)
+	h := C.QApplication_new(&argc, argv)
 	return &QApplication{h: h}
 }
 

binding.h

@@ -7,8 +7,7 @@ typedef void* PQWidget;
 #ifdef __cplusplus
 extern "C" {
 #endif
-
-PQApplication QApplication_new(int argc, char** argv);
+PQApplication QApplication_new(int* argc, char** argv);
 
 PQWidget QWidget_new();