fix: add missing else

Signed-off-by: Frederic Pillon <frederic.pillon@st.com>

Author: fpistm

src/STM32RTC.cpp

@@ -831,7 +831,7 @@ void STM32RTC::setAlarmSubSeconds(uint32_t subSeconds, Alarm name)
 #ifdef RTC_ALARM_B
     if (name == ALARM_B) {
       _alarmBSubSeconds = subSeconds;
-    }
+    } else
 #else
     UNUSED(name);
 #endif
@@ -854,7 +854,7 @@ void STM32RTC::setAlarmSeconds(uint8_t seconds, Alarm name)
 #ifdef RTC_ALARM_B
     if (name == ALARM_B) {
       _alarmBSeconds = seconds;
-    }
+    } else
 #else
     UNUSED(name);
 #endif
@@ -877,7 +877,7 @@ void STM32RTC::setAlarmMinutes(uint8_t minutes, Alarm name)
 #ifdef RTC_ALARM_B
     if (name == ALARM_B) {
       _alarmBMinutes = minutes;
-    }
+    } else
 #else
     UNUSED(name);
 #endif