SigMF: fixed compiler warnings

plugins/samplesource/sigmffileinput/sigmffiledata.h

@@ -62,10 +62,6 @@ struct SigMFFileDataType
 
         return *this;
     }
-
-    explicit operator SigMFFileDataType() const {
-        return SigMFFileDataType{static_cast<SigMFFileDataType>(*this)};
-    }
 };
 
 struct SigMFFileMetaInfo
@@ -155,10 +151,6 @@ struct SigMFFileMetaInfo
 
         return *this;
     }
-
-    explicit operator SigMFFileMetaInfo() const {
-        return SigMFFileMetaInfo{static_cast<SigMFFileMetaInfo>(*this)};
-    }
 };
 
 struct SigMFFileCapture
@@ -203,14 +195,6 @@ struct SigMFFileCapture
 
         return *this;
     }
-
-    explicit operator SigMFFileCapture() const {
-        return SigMFFileCapture{static_cast<SigMFFileCapture>(*this)};
-    }
-
-    explicit operator SigMFFileCapture() {
-        return SigMFFileCapture{static_cast<const SigMFFileCapture>(*this)};
-    }
 };
 
 #endif // INCLUDE_SIGMFFILEDATA_H

plugins/samplesource/sigmffileinput/sigmffileinput.cpp

@@ -604,6 +604,8 @@ bool SigMFFileInput::handleMessage(const Message& message)
         		startWorker();
             }
         }
+
+        return true;
     }
 	else if (MsgConfigureTrackWork::match(message))
 	{
@@ -794,6 +796,8 @@ bool SigMFFileInput::handleMessage(const Message& message)
             MsgReportTrackChange *msgToGUI = MsgReportTrackChange::create(m_currentTrackIndex);
             getMessageQueueToGUI()->push(msgToGUI);
         }
+
+        return true;
     }
 	else
 	{

plugins/samplesource/sigmffileinput/sigmffileinputgui.cpp

@@ -364,6 +364,8 @@ QString SigMFFileInputGUI::displayScaled(uint64_t value, int precision)
         return tr("%1M").arg(QString::number(value / 1000000.0, 'f', precision));
     } else if (value < 1000000000000) {
         return tr("%1G").arg(QString::number(value / 1000000000.0, 'f', precision));
+    } else {
+        return tr("%1").arg(QString::number(value, 'e', precision));
     }
 }