Eliminate implicit bool->int casting in dtvsignalmonitor.cpp.

The clang-tidy "implicit boolean conversion" check pointed out a
couple of implicit bool->integer conversions in the HandlePMT
function.  Rewrite two lines to eliminate the warning messages.

https://clang.llvm.org/extra/clang-tidy/checks/readability-implicit-bool-conversion.html

mythtv/libs/libmythtv/recorders/dtvsignalmonitor.cpp

@@ -369,8 +369,10 @@ void DTVSignalMonitor::HandlePMT(uint /*program_num*/, const ProgramMapTable *pm
 
     for (uint i = 0; i < pmt->StreamCount(); i++)
     {
-        hasVideo += pmt->IsVideo(i, GetDTVChannel()->GetSIStandard());
-        hasAudio += pmt->IsAudio(i, GetDTVChannel()->GetSIStandard());
+        if (pmt->IsVideo(i, GetDTVChannel()->GetSIStandard()))
+            hasVideo++;
+        if (pmt->IsAudio(i, GetDTVChannel()->GetSIStandard()))
+            hasAudio++;
     }
 
     if ((hasVideo >= GetStreamData()->GetVideoStreamsRequired()) &&