Merge change 25859 into eclair

* changes:
  Improve error-handling when an expected token is missing.
diff --git a/libacc/acc.cpp b/libacc/acc.cpp
index 436f806..6d9213c 100644
--- a/libacc/acc.cpp
+++ b/libacc/acc.cpp
@@ -4537,10 +4537,9 @@
     }
 
     void skip(intptr_t c) {
-        if (tok != c) {
+        if (!accept(c)) {
             error("'%c' expected", c);
         }
-        next();
     }
 
     bool accept(intptr_t c) {