Sprite minor fixes

Spelling of "motivate", don't send out the message when they didn't set
duration themselves, and update TODO comment.

Change-Id: I4de055f07a1831b9d12798faeda658ff441920f4
Reviewed-by: Damian Jansen <damian.jansen@nokia.com>

src/quick/items/qquicksprite.cpp

@@ -248,13 +248,15 @@ int QQuickSprite::variedDuration() const //Deals with precedence when multiple d
                 + (m_frameDurationVariation * ((qreal)qrand()/RAND_MAX) * 2)
                 - m_frameDurationVariation;
         return qMax(0, m_frames * mspf);
-    }
+    } else if (duration() >= 0) {
         qWarning() << "Sprite::duration is changing meaning to the full animation duration.";
         qWarning() << "Use Sprite::frameDuration for the old meaning, of per frame duration.";
-    qWarning() << "As an interim measure, duration/durationVariation means the same as frameDuration/frameDurationVariation, and you'll get this warning spewed out everywhere to movtivate you.";
+        qWarning() << "As an interim measure, duration/durationVariation means the same as frameDuration/frameDurationVariation, and you'll get this warning spewed out everywhere to motivate you.";
     //Note that the spammyness is due to this being the best location to detect, but also called once each animation loop
         return QQuickStochasticState::variedDuration() * m_frames;
     }
+    return 1000; //When nothing set
+}
 
 void QQuickSprite::startImageLoading()
 {

src/quick/items/qquickspriteengine_p.h

@@ -70,7 +70,7 @@ class Q_AUTOTEST_EXPORT QQuickStochasticState : public QObject //Currently for i
 public:
     QQuickStochasticState(QObject* parent = 0)
         : QObject(parent)
-        , m_duration(1000)
+        , m_duration(-1)
         , m_durationVariation(0)
         , m_randomStart(false)
     {

src/quick/items/qquickspriteimage.cpp

@@ -261,7 +261,7 @@ struct SpriteVertices {
     The sprite or sprites to draw. Sprites will be scaled to the size of this element.
 */
 
-//TODO: Implicitly size element to size of first sprite?
+//TODO: Implicitly size element to size of first sprite? or currentSprite?
 QQuickSpriteImage::QQuickSpriteImage(QQuickItem *parent) :
     QQuickItem(parent)
     , m_node(0)