logic: removed "unknown" source group status type

* removed "unknown" source group status type and implemented falling back to
  "disabled", because "unknown" should not be handled anywhere in the rest of
  the code base.

src/lib/settings/SourceGroupStatusType.cpp

@@ -1,5 +1,7 @@
 #include "settings/SourceGroupStatusType.h"
 
+#include "utility/logging/logging.h"
+
 std::string sourceGroupStatusTypeToString(SourceGroupStatusType v)
 {
 	switch (v)
@@ -8,10 +10,9 @@ std::string sourceGroupStatusTypeToString(SourceGroupStatusType v)
 		return "enabled";
 	case SOURCE_GROUP_STATUS_DISABLED:
 		return "disabled";
-	case SOURCE_GROUP_STATUS_UNKNOWN:
-		break;
 	}
-	return "unknown";
+	LOG_WARNING("Trying to convert unknown Source Group status type to string, falling back to disabled status.");
+	return "disabled"; 
 }
 
 SourceGroupStatusType stringToSourceGroupStatusType(std::string v)
@@ -25,5 +26,6 @@ SourceGroupStatusType stringToSourceGroupStatusType(std::string v)
 		return SOURCE_GROUP_STATUS_DISABLED;
 	}
 
-	return SOURCE_GROUP_STATUS_UNKNOWN;
+	LOG_WARNING("Trying to convert unknown string to Source Group status type, falling back to disabled status.");
+	return SOURCE_GROUP_STATUS_DISABLED;
 }

src/lib/settings/SourceGroupStatusType.h

@@ -6,8 +6,7 @@
 enum SourceGroupStatusType
 {
 	SOURCE_GROUP_STATUS_ENABLED,
-	SOURCE_GROUP_STATUS_DISABLED,
-	SOURCE_GROUP_STATUS_UNKNOWN
+	SOURCE_GROUP_STATUS_DISABLED
 };
 
 std::string sourceGroupStatusTypeToString(SourceGroupStatusType v);