Correct the bit field sizes in QTextOption

There's an off-by-one error that has been carried over since at least
Qt 4.0.0. Because of that, the class is actually 4 bytes bigger than
calculated.

Change-Id: Iaefdf657fdc780aae16390fde3c01074160e4cd9
Reviewed-by: Lars Knoll <lars.knoll@digia.com>

src/gui/text/qtextoption.cpp

@@ -61,6 +61,7 @@ QTextOption::QTextOption()
       wordWrap(QTextOption::WordWrap),
       design(false),
       unused(0),
+      unused2(0),
       f(0),
       tab(-1),
       d(0)
@@ -78,6 +79,7 @@ QTextOption::QTextOption(Qt::Alignment alignment)
       wordWrap(QTextOption::WordWrap),
       design(false),
       unused(0),
+      unused2(0),
       f(0),
       tab(-1),
       d(0)
@@ -104,6 +106,7 @@ QTextOption::QTextOption(const QTextOption &o)
       design(o.design),
       direction(o.direction),
       unused(o.unused),
+      unused2(o.unused2),
       f(o.f),
       tab(o.tab),
       d(0)

src/gui/text/qtextoption.h

@@ -134,7 +134,8 @@ private:
     uint wordWrap : 4;
     uint design : 1;
     uint direction : 2;
-    uint unused : 18;
+    uint unused : 17;
+    uint unused2; // ### Qt 6: remove unnecessary, extra 32 bits
     uint f;
     qreal tab;
     QTextOptionPrivate *d;