lcd4l: fix removing start/stop hint when init script fails

Origin commit data
------------------
Commit: 921df0c713
Author: vanhofen <vanhofen@gmx.de>
Date: 2021-07-16 (Fri, 16 Jul 2021)

Origin message was:
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- lcd4l: fix removing start/stop hint when init script fails

src/driver/lcd4l.cpp

@@ -169,6 +169,8 @@ void CLCD4l::StartLCD4l()
 	{
 		if (exec_initscript("lcd4linux", "start"))
 			OnAfterStart();
+		else
+			OnAfterError();
 	}
 }
 
@@ -190,6 +192,8 @@ void CLCD4l::StopLCD4l()
 
 	if (exec_initscript("lcd4linux", "stop"))
 		OnAfterStop();
+	else
+		OnAfterError();
 }
 
 void CLCD4l::SwitchLCD4l()
@@ -879,6 +883,8 @@ void CLCD4l::ParseInfo(uint64_t parseID, bool newID, bool firstRun)
 				OnBeforeRestart();
 				if (exec_initscript("lcd4linux", "restart"))
 					OnAfterRestart();
+				else
+					OnAfterError();
 			}
 		}
 	}