Don't crash when the shader source is null.

diff --git a/src/declarative/scenegraph/util/qsgtextureprovider.cpp b/src/declarative/scenegraph/util/qsgtextureprovider.cpp
index b411887..2cae0f8 100644 (file)
--- a/src/declarative/scenegraph/util/qsgtextureprovider.cpp
+++ b/src/declarative/scenegraph/util/qsgtextureprovider.cpp
@@ -58,7 +58,7 @@ QT_BEGIN_NAMESPACE
  */
 QSGTextureProvider *QSGTextureProvider::from(QObject *object)
 {
-    return static_cast<QSGTextureProvider *>(object->qt_metacast("QSGTextureProvider"));
+    return object ? static_cast<QSGTextureProvider *>(object->qt_metacast("QSGTextureProvider")) : 0;
 }