free the ctx at the end of bench_ecdh

Author: elichai

src/bench_ecdh.c

@@ -28,8 +28,6 @@ static void bench_ecdh_setup(void* arg) {
         0xa2, 0xba, 0xd1, 0x84, 0xf8, 0x83, 0xc6, 0x9f
     };
 
-    /* create a context with no capabilities */
-    data->ctx = secp256k1_context_create(SECP256K1_FLAGS_TYPE_CONTEXT);
     for (i = 0; i < 32; i++) {
         data->scalar[i] = i + 1;
     }
@@ -49,6 +47,11 @@ static void bench_ecdh(void* arg) {
 int main(void) {
     bench_ecdh_data data;
 
+    /* create a context with no capabilities */
+    data.ctx = secp256k1_context_create(SECP256K1_FLAGS_TYPE_CONTEXT);
+
     run_benchmark("ecdh", bench_ecdh, bench_ecdh_setup, NULL, &data, 10, 20000);
+
+    secp256k1_context_destroy(data.ctx);
     return 0;
 }