fixes for more recent Debian/Clang

Author: kkaefer

.github/workflows/clang-tidy.yml

@@ -15,7 +15,7 @@ jobs:
           - image: "debian:testing"
             clang: 19
           - image: "debian:experimental"
-            clang: 20
+            clang: 22
     container:
       image: ${{ matrix.image }}
       env:

include/protozero/varint.hpp

@@ -38,6 +38,7 @@ namespace detail {
         uint64_t val = 0;
 
         if (iend - begin >= max_varint_length) {  // fast path
+            assert(iend - p >= max_varint_length); // help Clang analyzer
             do {
                 int64_t b = *p++;
                           val  = ((static_cast<uint64_t>(b) & 0x7fU)       ); if (b >= 0) { break; }