pwm command: fix -e param (it was just ignored)

to keep the behavior the same, remove the -e flags from all pwm commands
that use it in the scripts.

ROMFS/px4fmu_common/init.d/rc.interface

@@ -198,16 +198,16 @@ then
 			#
 			if [ $PWM_AUX_RATE != none ]
 			then
-				pwm rate -e -c ${PWM_AUX_OUT} -r ${PWM_AUX_RATE} -d ${OUTPUT_AUX_DEV}
+				pwm rate -c ${PWM_AUX_OUT} -r ${PWM_AUX_RATE} -d ${OUTPUT_AUX_DEV}
 			fi
 
 			if [ $PWM_AUX_MIN != none ]
 			then
-				pwm min -e -c ${PWM_AUX_OUT} -p ${PWM_AUX_MIN} -d ${OUTPUT_AUX_DEV}
+				pwm min -c ${PWM_AUX_OUT} -p ${PWM_AUX_MIN} -d ${OUTPUT_AUX_DEV}
 			fi
 			if [ $PWM_AUX_MAX != none ]
 			then
-				pwm max -e -c ${PWM_AUX_OUT} -p ${PWM_AUX_MAX} -d ${OUTPUT_AUX_DEV}
+				pwm max -c ${PWM_AUX_OUT} -p ${PWM_AUX_MAX} -d ${OUTPUT_AUX_DEV}
 			fi
 		fi
 
@@ -225,12 +225,12 @@ then
 		#
 		if [ $PWM_AUX_DISARMED != none -a $PWM_ACHDIS != none ]
 		then
-			pwm disarmed -e -c ${PWM_ACHDIS} -p ${PWM_AUX_DISARMED} -d ${OUTPUT_AUX_DEV}
+			pwm disarmed -c ${PWM_ACHDIS} -p ${PWM_AUX_DISARMED} -d ${OUTPUT_AUX_DEV}
 		fi
 
 		if [ $FAILSAFE_AUX != none ]
 		then
-			pwm failsafe -e -d ${OUTPUT_AUX_DEV} ${FAILSAFE}
+			pwm failsafe -d ${OUTPUT_AUX_DEV} ${FAILSAFE}
 		fi
 
 	fi

src/systemcmds/pwm/pwm.c

@@ -210,7 +210,7 @@ pwm_main(int argc, char *argv[])
 			break;
 
 		case 'e':
-			error_on_warn = false;
+			error_on_warn = true;
 			break;
 
 		case 'c':