build: avoid using implicit int to adhere to C99

Otherwise -Wstrict-prototypes now emits the following warnings:

  mini-dtls-large.c:30:5: error: function declaration isn't a prototype [-Werror=strict-prototypes]
     30 | int main()
        |     ^~~~
  mini-dtls-large.c: In function 'main':
  mini-dtls-large.c:30:5: error: old-style function definition [-Werror=old-style-definition]
  cc1: all warnings being treated as errors

Signed-off-by: Daiki Ueno <ueno@gnu.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/dtls-rehandshake-anon.c b/tests/dtls-rehandshake-anon.c
index f281f5d3fa..2d3566f2dc 100644
--- a/tests/dtls-rehandshake-anon.c
+++ b/tests/dtls-rehandshake-anon.c
@@ -29,7 +29,7 @@
 
 #if defined(_WIN32)
 
-int main()
+int main(void)
 {
 	exit(77);
 }