dvb/access.c - properly cast memory returned by malloc()

             - fix small memory leak on closing of dvb plugin.
dvb/linux-dvb.c - remove astray spaces
                - always empty the event queue before FE_SET_FRONTEND and FrontendCheck(). 
                  dvbstream does the same for OFDM and QAM. 

Summary: 
   DVB-C is working (did a few tests) 
   DVB-T not tested. 
   Using polarization=A doesn't work anymore INVERSION_AUTO is not honered for tuning. 
   SEC_VOLTAGE_OFF is missing when using latest code DVB-1.1.7 from http://www.metzlerbros.org/dvb/index.html. While include/linux/dvb/version.h is not updated and still reflects this API version: #define DVB_API_VERSION 3

modules/access/dvb/access.c

@@ -227,7 +227,7 @@ static int Open( vlc_object_t *p_this )
     int                 i_test;
 
     /* Initialize structure */
-    p_dvb = malloc( sizeof( thread_dvb_data_t ) );
+    p_dvb = (thread_dvb_data_t *)malloc( sizeof( thread_dvb_data_t ) );
     if( p_dvb == NULL )
     {
         msg_Err( p_input, "out of memory" );
@@ -424,6 +424,9 @@ static void Close( vlc_object_t *p_this )
         E_(DMXUnsetFilter)( p_input, p_dvb->p_demux_handles[0].i_handle );
         p_dvb->p_demux_handles[0].i_type = 0;
     }
+
+    E_(FrontendClose)( p_input );
+    free( p_dvb );
 }
 
 /*****************************************************************************

modules/access/dvb/linux_dvb.c

@@ -99,7 +99,13 @@ int E_(FrontendOpen)( input_thread_t * p_input )
         frontend[sizeof(frontend) - 1] = '\0';
     }
 
-    p_frontend = malloc(sizeof(frontend_t));
+    p_frontend = (frontend_t *) malloc(sizeof(frontend_t));
+    if( p_frontend == NULL )
+    {
+        msg_Err( p_input, "FrontEndOpen: out of memory" );
+        return -1;
+    }
+
     p_dvb->p_frontend = p_frontend;
 
     msg_Dbg( p_input, "Opening device %s", frontend );
@@ -630,6 +636,7 @@ static int FrontendSetQPSK( input_thread_t * p_input )
     }
 
     msleep(100000);
+
     /* Empty the event queue */
     for ( ; ; )
     {
@@ -676,6 +683,14 @@ static int FrontendSetQAM( input_thread_t * p_input )
 
     fep.u.qam.modulation = DecodeModulation( p_input );
 
+    /* Empty the event queue */
+    for ( ; ; )
+    {
+        struct dvb_frontend_event event;
+        if ( ioctl( p_frontend->i_handle, FE_GET_EVENT, &event ) < 0 )
+            break;
+    }
+
     /* Now send it all to the frontend device */
     if ( (i_ret = ioctl( p_frontend->i_handle, FE_SET_FRONTEND, &fep )) < 0 )
     {
@@ -805,6 +820,14 @@ static int FrontendSetOFDM( input_thread_t * p_input )
     fep.u.ofdm.guard_interval = DecodeGuardInterval( p_input );
     fep.u.ofdm.hierarchy_information = DecodeHierarchy( p_input );
 
+    /* Empty the event queue */
+    for ( ; ; )
+    {
+        struct dvb_frontend_event event;
+        if ( ioctl( p_frontend->i_handle, FE_GET_EVENT, &event ) < 0 )
+            break;
+    }
+
     /* Now send it all to the frontend device */
     if ( (ret = ioctl( p_frontend->i_handle, FE_SET_FRONTEND, &fep )) < 0 )
     {