cppcheck: Fix a couple of warnings about the "returned" variable in m…

…ythnetvision.

1) This variable is declared as a "uint" so it can never be less than
zero.  2) One the value of zero has been handled, the test for >0 is
redundant.

mythplugins/mythnetvision/mythnetvision/netsearch.cpp

@@ -370,7 +370,7 @@ void NetSearch::SearchFinished(void)
     m_nextPageToken = item->nextPageToken();
     m_prevPageToken = item->prevPageToken();
 
-    if (returned <= 0)
+    if (returned == 0)
         return;
 
     m_siteList->GetItemAt(m_currentGrabber)->
@@ -384,7 +384,7 @@ void NetSearch::SearchFinished(void)
         if (searchresults % returned != 0)    // Partial page?
             m_maxpage++;
     }
-    if (m_pageText && m_maxpage > 0 && m_pagenum > 0 && returned > 0)
+    if (m_pageText && m_maxpage > 0 && m_pagenum > 0)
     {
         m_pageText->SetText(QString("%1 / %2")
                         .arg(QString::number(m_pagenum))