libstb_hal: Suppress implicit-fallthrough warnings from GCC 7

libarmbox/hdmi_cec.cpp

@@ -555,8 +555,10 @@ void hdmi_cec::Receive()
 			break;
 		}
 		case CEC_OPCODE_USER_CONTROL_PRESSED: /* key pressed */
+		{
 			keypressed = true;
 			pressedkey = rxmessage.data[1];
+		} // fall through
 		case CEC_OPCODE_USER_CONTROL_RELEASE: /* key released */
 		{
 			long code = translateKey(pressedkey);

libdvbci/dvbci_camgr.cpp

@@ -85,6 +85,7 @@ int eDVBCICAManagerSession::doAction()
 		}
 		case stateFinal:
 			printf("[CI CA] stateFinal and action should not happen\n");
+			// fall through
 		default:
 			return 0;
 	}

libdvbci/dvbci_ccmgr.cpp

@@ -1339,6 +1339,7 @@ int eDVBCIContentControlManagerSession::doAction()
 		}
 		case stateFinal:
 			printf("stateFinal und action! kann doch garnicht sein ;)\n");
+			// fall through
 		default:
 			return 0;
 	}

libdvbci/dvbci_datetimemgr.cpp

@@ -52,6 +52,7 @@ int eDVBCIDateTimeSession::doAction()
 			return 0;
 		case stateFinal:
 			printf("stateFinal und action! kann doch garnicht sein ;)\n");
+			// fall through
 		default:
 			return 0;
 	}

libdvbci/dvbci_session.cpp

@@ -179,11 +179,12 @@ eDVBCISession* eDVBCISession::createSession(eDVBCISlot *slot, const unsigned cha
 				printf("[CI SESS] CC MANAGER\n");
 				sessions[session_nb - 1] = new eDVBCIContentControlManagerSession(slot);
 				break;
-		}
+		} // fall through
 		case 0x00100041:
 //			session=new eDVBCIAuthSession;
 			printf("[CI SESS] AuthSession\n");
 //			break;
+		  // fall through
 		case 0x00200041:
 		default:
 			printf("[CI SESS] unknown resource type %02x %02x %02x %02x\n", resource_identifier[0], resource_identifier[1], resource_identifier[2], resource_identifier[3]);

libeplayer3-arm/output/writer/mipsel/pcm.c

@@ -137,6 +137,7 @@ static int writeData(WriterAVCallData_t *call)
 			case AV_CODEC_ID_PCM_S16LE:
 			case AV_CODEC_ID_PCM_U16LE:
 				LE = 1;
+				// fall through
 			case AV_CODEC_ID_PCM_S16BE:
 			case AV_CODEC_ID_PCM_U16BE:
 				width = depth = 16;
@@ -144,6 +145,7 @@ static int writeData(WriterAVCallData_t *call)
 			case AV_CODEC_ID_PCM_S24LE:
 			case AV_CODEC_ID_PCM_U24LE:
 				LE = 1;
+				// fall through
 			case AV_CODEC_ID_PCM_S24BE:
 			case AV_CODEC_ID_PCM_U24BE:
 				width = depth = 24;
@@ -151,6 +153,7 @@ static int writeData(WriterAVCallData_t *call)
 			case AV_CODEC_ID_PCM_S32LE:
 			case AV_CODEC_ID_PCM_U32LE:
 				LE = 1;
+				// fall through
 			case AV_CODEC_ID_PCM_S32BE:
 			case AV_CODEC_ID_PCM_U32BE:
 				width = depth = 32;