[6.0] a9745310b Fix previous

[Dridi Boukelmoune]

commit a9745310b4a9b7f10d94cf9da3ebeb4c117c58ff
Author: Federico G. Schwindt <fgsch at lodoss.net>
Date:   Sat Apr 21 08:41:11 2018 +0100

    Fix previous

diff --git a/bin/varnishd/fuzzers/esi_parse_fuzzer.c b/bin/varnishd/fuzzers/esi_parse_fuzzer.c
index 056e63677..0a372b721 100644
--- a/bin/varnishd/fuzzers/esi_parse_fuzzer.c
+++ b/bin/varnishd/fuzzers/esi_parse_fuzzer.c
@@ -107,14 +107,14 @@ LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
 int
 main(int argc, char **argv)
 {
-	size_t len;
+	ssize_t len;
 	char *buf;
 	int i;
 
 	for (i = 1; i < argc; i++) {
 		buf = VFIL_readfile(NULL, argv[i], &len);
 		AN(buf);
-		LLVMFuzzerTestOneInput(buf, len);
+		LLVMFuzzerTestOneInput((uint8_t *)buf, len);
 		free(buf);
 	}
 }