diff -ur ../kdepim-4.14.3-orig/knode/knfiltermanager.cpp ./knode/knfiltermanager.cpp
--- ../kdepim-4.14.3-orig/knode/knfiltermanager.cpp	2014-11-06 17:45:47.000000000 +0900
+++ ./knode/knfiltermanager.cpp	2020-04-15 18:23:03.000000000 +0900
@@ -201,7 +201,7 @@
     foreach ( KNArticleFilter *filter, mFilterList )
       activeFilters << filter->id();
     int newId = 1;
-    while ( activeFilters.contains( newId ) > 0 )
+    while ( activeFilters.contains( newId ) != NULL )
       newId++;
     f->setId( newId );
   }
diff -ur ../kdepim-4.14.3-orig/korganizer/kodaymatrix.cpp ./korganizer/kodaymatrix.cpp
--- ../kdepim-4.14.3-orig/korganizer/kodaymatrix.cpp	2014-11-06 17:45:47.000000000 +0900
+++ ./korganizer/kodaymatrix.cpp	2020-04-15 18:02:07.000000000 +0900
@@ -862,7 +862,7 @@
       p.setPen( actcol );
     }
     // reset bold font to plain font
-    if ( mEvents.contains( mDays[i] ) > 0 ) {
+    if ( mEvents.contains( mDays[i] ) != NULL ) {
       QFont myFont = font();
       myFont.setBold( false );
       p.setFont( myFont );