fix chaining of COMPRESS invocation

it was bound to the use of NAMESPACE, which made no sense at all.

src/drv_imap.c

@@ -1527,6 +1527,7 @@ static void imap_open_store_authenticate2_p2( imap_store_t *, struct imap_cmd *,
 static void imap_open_store_namespace( imap_store_t * );
 static void imap_open_store_namespace_p2( imap_store_t *, struct imap_cmd *, int );
 static void imap_open_store_namespace2( imap_store_t * );
+static void imap_open_store_compress( imap_store_t * );
 #ifdef HAVE_LIBZ
 static void imap_open_store_compress_p2( imap_store_t *, struct imap_cmd *, int );
 #endif
@@ -2055,7 +2056,7 @@ imap_open_store_namespace( imap_store_t *ctx )
 			imap_open_store_namespace2( ctx );
 		return;
 	}
-	imap_open_store_finalize( ctx );
+	imap_open_store_compress( ctx );
 }
 
 static void
@@ -2085,6 +2086,15 @@ imap_open_store_namespace2( imap_store_t *ctx )
 			ctx->prefix = nsp_1st_ns->val;
 		if (!ctx->delimiter)
 			ctx->delimiter = nfstrdup( nsp_1st_dl->val );
+		imap_open_store_compress( ctx );
+	} else {
+		imap_open_store_bail( ctx, FAIL_FINAL );
+	}
+}
+
+static void
+imap_open_store_compress( imap_store_t *ctx )
+{
 #ifdef HAVE_LIBZ
 	if (CAP(COMPRESS_DEFLATE)) { /* XXX make that configurable */
 		imap_exec( ctx, 0, imap_open_store_compress_p2, "COMPRESS DEFLATE" );
@@ -2092,9 +2102,6 @@ imap_open_store_namespace2( imap_store_t *ctx )
 	}
 #endif
 	imap_open_store_finalize( ctx );
-	} else {
-		imap_open_store_bail( ctx, FAIL_FINAL );
-	}
 }
 
 #ifdef HAVE_LIBZ