Checking, does the touch is within the height of the line, not the he…

…ight of the sprite? (cocos2d#19394)

cocos/2d/CCTextFieldTTF.cpp

@@ -387,7 +387,7 @@ void TextFieldTTF::setCursorFromPoint(const Vec2 &point, const Camera* camera)
                     auto sprite = getLetter(latterPosition);
                     if (sprite)
                     {
-                        rect.size = sprite->getContentSize();
+                        rect.size = Size(sprite->getContentSize().width, _lineHeight);
                         if (isScreenPointInRect(point, camera, sprite->getWorldToNodeTransform(), rect, nullptr))
                         {
                             setCursorPosition(latterPosition);