Merge pull request #31 in SA/ble_examples from LPRFAPPS-777_audio_receiver_memory_leak_fix to ble_examples-2.2-develop

Squashed commit of the following:

commit 05d9d5873ffb6f7a262d54ff00d542b7e7439a87
Author: Marie Hernes <[email protected]>
Date:   Wed Apr 5 16:05:12 2017 +0200

    LPRFAPPS-777 Fixed memory leak

commit 539add28313d7b7620eb54b734f6f830bb424db9
Author: Marie Hernes <[email protected]>
Date:   Wed Apr 5 15:57:31 2017 +0200

    Revert "LPRFAPPS-777 Fixed memory leak."

    This reverts commit 55d7ee56290514873eb9c0d8767d65657d3f2188.

commit ac598b4bb7f7a80faa993ba8556abb19a1312801
Author: Marie Hernes <[email protected]>
Date:   Wed Apr 5 15:41:41 2017 +0200

    LPRFAPPS-777 Fixed memory leak.

Author: Thomas Kopriva

src/examples/simple_central_audio_receiver/cc26xx/app/simple_central_audio_receiver.c

@@ -1388,6 +1388,7 @@ static void SimpleBLECentral_processGATTMsg(gattMsgEvent_t *pMsg)
               i2sParams.pvContBuffer           = (void *) audio_decoded;
               i2sParams.ui32conBufTotalSize    = sizeof(int16_t) * (streamVariables.samplesPerFrame * I2SCC26XX_QUEUE_SIZE);
               I2SCC26XX_open(i2sHandle, &i2sParams);
+              Display_print0(dispHandle, 5, 0, "Opened I2S driver");
               streamVariables.i2sOpened = TRUE;
             }
 #else //STREAM_TO_PC
@@ -1449,6 +1450,9 @@ static void SimpleBLECentral_processGATTMsg(gattMsgEvent_t *pMsg)
               {
                 sbc_finish(&sbc);
               }
+            }
+            if (streamVariables.i2sOpened == TRUE)
+            {
               I2SCC26XX_close(i2sHandle);
               streamVariables.i2sOpened = FALSE;
               Display_print0(dispHandle, 5, 0, "Closed I2S driver");