Fix UBSAN implicit conversion warning in test/fuzz/fuzzer_example_flush.c.

diff --git a/test/fuzz/fuzzer_example_flush.c b/test/fuzz/fuzzer_example_flush.c
index baa6988e367a1b5e696f95ab3b790d129210b035..1901fed09171fcdfd821144d55297954eea99877 100644 (file)
--- a/test/fuzz/fuzzer_example_flush.c
+++ b/test/fuzz/fuzzer_example_flush.c
@@ -42,7 +42,7 @@ void test_flush(unsigned char *compr, z_size_t *comprLen) {
     err = PREFIX(deflate)(&c_stream, Z_FULL_FLUSH);
     CHECK_ERR(err, "deflate flush 1");
 
-    compr[3]++; /* force an error in first compressed block */
+    compr[3] = (unsigned char)(compr[3] + 1); /* force an error in first compressed block */
     c_stream.avail_in = len - 3;
 
     err = PREFIX(deflate)(&c_stream, Z_FINISH);