ast: simplify AppendStmt

Signed-off-by: Ran Benita <ran234@gmail.com>

src/xkbcomp/ast-build.c

@@ -70,19 +70,15 @@ malloc_or_die(size_t size)
 ParseCommon *
 AppendStmt(ParseCommon *to, ParseCommon *append)
 {
-    ParseCommon *start = to;
+    ParseCommon *iter;
 
-    if (append == NULL)
+    if (!to)
-        return to;
-    while ((to != NULL) && (to->next != NULL))
-    {
-        to = to->next;
-    }
-    if (to) {
-        to->next = append;
-        return start;
-    }
         return append;
+
+    for (iter = to; iter->next; iter = iter->next);
+
+    iter->next = append;
+    return to;
 }
 
 ExprDef *