Tests and coverage on gcc and clang

1 files changed, 1 insertions, 1 deletions

diff --git a/whiteboard.cpp b/whiteboard.cpp
index 2718937..cebd0b1 100644
--- a/whiteboard.cpp
+++ b/whiteboard.cpp
@@ -38,7 +38,7 @@ namespace {
  uint32_t checksum32(const std::string& s)
  {
   uint32_t result{0};
-  for (int i = 0; i < s.size(); i++) {
+  for (unsigned int i = 0; i < s.size(); i++) {
    result = ((result >> 1) | ((result & 1) << 31)) ^ (s[i] & 0xFF);
   }
   return result & 0x7FFFFFFF;