xmllint was not parsing the --c14n11 flag

Cut and paste error, using the wrong variable
diff --git a/xmllint.c b/xmllint.c
index 9d46ac5..b297ded 100644
--- a/xmllint.c
+++ b/xmllint.c
@@ -2580,7 +2580,7 @@
 		    fprintf(stderr, "Failed to canonicalize\n");
 		    progresult = XMLLINT_ERR_OUT;
 		}
-	    } else if (canonical) {
+	    } else if (canonical_11) {
 	        xmlChar *result = NULL;
 		int size;