QmlJS: Fix initialization order

This avoids some compiler warnings.

Change-Id: I81a626d22d39a2a45c2bf64403b0e28b76e50105
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

src/libs/qmljs/qmljscodeformatter.cpp

@@ -41,9 +41,9 @@ CodeFormatter::BlockData::BlockData()
 }
 
 CodeFormatter::CodeFormatter()
-    : m_indentDepth(0)
+    : m_tokenIndex(0)
+    , m_indentDepth(0)
     , m_tabSize(4)
-    , m_tokenIndex(0)
 {
 }