[libc] Fix integer conversion error in test

diff --git a/libc/test/src/string/strerror_test.cpp b/libc/test/src/string/strerror_test.cpp
index 3830e1b..20a8fba 100644 (file)
--- a/libc/test/src/string/strerror_test.cpp
+++ b/libc/test/src/string/strerror_test.cpp
@@ -150,7 +150,7 @@ TEST(LlvmLibcStrErrorTest, KnownErrors) {
   };
 
   for (size_t i = 0; i < (sizeof(message_array) / sizeof(char *)); ++i) {
-    EXPECT_STREQ(__llvm_libc::strerror(i), message_array[i]);
+    EXPECT_STREQ(__llvm_libc::strerror(static_cast<int>(i)), message_array[i]);
   }
 }