Added initialization of alarm severity on probe. This value is not used, but should be initialized regardless. This was flagged as an error by the Codacy static code analysis.

Codacy link: https://app.codacy.com/gh/epics-base/epics-base/file/42103575016/issues/source?bid=16430872&fileBranchId=16430872#l604
Launchpad bug: https://bugs.launchpad.net/epics-base/+bug/1862918

LP: #1862918

modules/database/src/ioc/db/dbChannel.c

@@ -37,6 +37,7 @@
 #include "link.h"
 #include "recSup.h"
 #include "special.h"
+#include "alarm.h"
 
 typedef struct parseContext {
     dbChannel *chan;
@@ -601,6 +602,7 @@ long dbChannelOpen(dbChannel *chan)
     probe.field_type  = dbChannelExportType(chan);
     probe.no_elements = dbChannelElements(chan);
     probe.field_size  = dbChannelFieldSize(chan);
+    probe.sevr = NO_ALARM;
     p = probe;
 
     /*