Silence a coverity warning about comparing the address of pointer 'child' when it might be null. None issue, but it does no harm to fix.
Initialise all members of MythUIFileBrowser which require initialisation. Coverity.
Initialise members of BrowserApi. Coverity.
Initialise float m_relativeSize() in the constructor. Value chosen is extremely arbitrary. Coverity.
Initialise callbacks in MythUIHelperPrivate constructor. It was done anyway a few moments later. Coverity
Check return value of FindThemeFile() when loading an image.
It is redundant to call indexIn() after exactMatch() for QRegExp, as exactMatch() will also populate capturedTexts(). Coverity (indirectly)
Initialise m_pixelAspectRatio in DisplayRes. Coverity.