try to fix nonnull warning firing off on older gcc

sorsarre · sorsarre · commit c1f70abf8661 · 2025-08-28T03:13:00.000+03:00
diff --git a/bitreader/test/gtest_common.hpp b/bitreader/test/gtest_common.hpp
@@ -42,7 +42,14 @@ namespace {
             size_t to_copy = std::min(_data.size() - position, bytes);
             auto begin = _data.begin() + position;
             auto end = begin + to_copy;
-            std::copy(begin, end, dest);
+            if (!dest)
+            {
+                to_copy = 0;
+            }
+            else
+            {
+                std::copy(begin, end, dest);
+            }
             return to_copy;
         }
 
