Set INVALID severity if record cannot be processed.

Before, the severity was only set when the process routine was called
and failed. It was not set, when the routine could not be called because
the device support had not been initialized properly.

mrfApp/mrfEpicsSrc/mrfRecordDefinitions.cpp

@@ -130,10 +130,12 @@ long processRecord(void *recordVoid) {
   } catch (std::exception &e) {
     errorExtendedPrintf("%s Record processing failed: %s", record->name,
         e.what());
+    recGblSetSevr(record, SOFT_ALARM, INVALID_ALARM);
     return -1;
   } catch (...) {
     errorExtendedPrintf("%s Record processing failed: Unknown error.",
         record->name);
+    recGblSetSevr(record, SOFT_ALARM, INVALID_ALARM);
     return -1;
   }
   return 0;