fix compile errors with functions not returning anything

src/qrdisasm.cpp

@@ -10,4 +10,5 @@ QRDisasm::QRDisasm(QRCore *core)
 
 bool QRDisasm::disassembleAt (ut64 addr, QRDisasmOption opt, QRDisasmRow &dr) {
     printf ("FUCK\n");
+    return false;
 }

src/widgets/commentswidget.cpp

@@ -134,4 +134,5 @@ bool CommentsWidget::eventFilter(QObject *obj, QEvent *event) {
             }
         }
     }
+    return false; //allow the event to be handled further
 }

src/widgets/functionswidget.cpp

@@ -377,4 +377,5 @@ bool FunctionsWidget::eventFilter(QObject *obj, QEvent *event) {
             }
         }
     }
+    return false; //allow the event to be handled further
 }

src/widgets/sectionswidget.cpp

@@ -113,4 +113,5 @@ bool SectionsWidget::eventFilter(QObject *obj, QEvent *event) {
             }
         }
     }
+    return false; //allow the event to be handled further
 }