Fix several functions that return a boolean not an integer.

One case requires changing the function return type, the others
require adding a test at the end of the function.

mythtv/libs/libmythmetadata/videoscan.cpp

@@ -382,7 +382,7 @@ bool VideoScannerThread::updateDB(const FileCheckList &add, const PurgeList &rem
             SendProgressEvent(++counter);
     }
 
-    return ret;
+    return ret > 0;
 }
 
 bool VideoScannerThread::buildFileList(const QString &directory,

mythtv/libs/libmythtv/recorders/vbitext/cc.cpp

@@ -56,7 +56,7 @@ static int parityok(int n)      /* check parity for 2 bytes packed in n */
 }
 
 
-static int decodebit(const unsigned char *data, int threshold, int scale1)
+static bool decodebit(const unsigned char *data, int threshold, int scale1)
 {
     int i, sum = 0;
     for (i = 0; i < scale1; i++)

mythtv/libs/libmythtv/remoteencoder.cpp

@@ -619,7 +619,7 @@ bool RemoteEncoder::CheckChannel(QString channel)
     strlist << channel;
 
     if (SendReceiveStringList(strlist, 1))
-        return strlist[0].toInt();
+        return strlist[0].toInt() != 0;
 
     return false;
 }
@@ -643,7 +643,7 @@ bool RemoteEncoder::ShouldSwitchToAnotherCard(QString channelid)
     strlist << channelid;
 
     if (SendReceiveStringList(strlist, 1))
-        return strlist[0].toInt();
+        return strlist[0].toInt() != 0;
 
     return false;
 }
@@ -671,7 +671,7 @@ bool RemoteEncoder::CheckChannelPrefix(
     is_extra_char_useful = strlist[2].toInt();
     needed_spacer = (strlist[3] == "X") ? "" : strlist[3];
 
-    return strlist[0].toInt();
+    return strlist[0].toInt() != 0;
 }
 
 static QString cleanup(const QString &str)
@@ -757,7 +757,7 @@ bool RemoteEncoder::SetChannelInfo(const InfoMap &infoMap)
     strlist << make_safe(infoMap["XMLTV"]);
 
     if (SendReceiveStringList(strlist, 1))
-        return strlist[0].toInt();
+        return strlist[0].toInt() != 0;
 
     return false;
 }

mythtv/libs/libmythtv/vbi608extractor.cpp

@@ -321,7 +321,7 @@ bool VBI608Extractor::ExtractCC(const VideoFrame *picframe, uint max_lines)
         }
     }
 
-    return found_cnt;
+    return found_cnt > 0;
 }
 
 bool VBI608Extractor::ExtractCC12(const unsigned char *buf, uint width)