fixed some Radio433 bugs

libguh/hardware/gpio.cpp

@@ -96,9 +96,9 @@ int Gpio::openGpio()
     int fd = open(buf, O_RDONLY | O_NONBLOCK );
     if (fd < 0) {
         qDebug() << "ERROR: could not open /sys/class/gpio" << m_gpio << "/direction";
-        return fd;
+        return false;
     }
-    return fd;
+    return true;
 }
 
 /*! Returns true, if the direction \a dir of the GPIO could be set correctly.

libguh/hardware/radio433.h

@@ -31,6 +31,7 @@ public:
     explicit Radio433(QObject *parent = 0);
     ~Radio433();
 
+    bool available();
     bool enabel();
     bool disabel();
 

libguh/hardware/radio433transmitter.h

@@ -37,6 +37,7 @@ public:
 
     bool startTransmitter();
     bool stopTransmitter();
+    bool setUpGpio();
 
     void sendData(QList<int> rawData);
 
@@ -51,7 +52,6 @@ private:
     bool m_allowSending;
 
     void run();
-    bool setUpGpio();
 
     QMutex m_queueMutex;
     QQueue<QList<int> > m_rawDataQueue;