[glib-networking/warning-windows] base: return a string always to avoid warning on windows

[Ignacio Casal Quinteiro <icq src gnome org>]

commit d895d11d03ee1f14d4c7a29cf5b1b17626a8e808
Author: Ignacio Casal Quinteiro <qignacio amazon com>
Date:   Mon Mar 30 12:25:00 2020 +0200

    base: return a string always to avoid warning on windows

 tls/base/gtlsconnection-base.c | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/tls/base/gtlsconnection-base.c b/tls/base/gtlsconnection-base.c
index ba627a2..03e1e0d 100644
--- a/tls/base/gtlsconnection-base.c
+++ b/tls/base/gtlsconnection-base.c
@@ -483,7 +483,10 @@ op_to_string (GTlsConnectionBaseOp op)
     case G_TLS_CONNECTION_BASE_OP_CLOSE_BOTH:
       return "OP_CLOSE_BOTH";
     }
+
   g_assert_not_reached ();
+
+  return "UNKNOWN_OP";
 }
 
 static const gchar *
@@ -504,7 +507,10 @@ status_to_string (GTlsConnectionBaseStatus st)
     case G_TLS_CONNECTION_BASE_ERROR:
       return "ERROR";
     }
+
   g_assert_not_reached ();
+
+  return "UNKNOWN_STATUS";
 }
 
 static gboolean