fix curl types; curl_easy_setopt parameters should be either long,
a function pointer, an object pointer, or curl_off_t.

see https://curl.se/libcurl/c/curl_easy_setopt.html

Index: plugins/check_curl.d/check_curl_helpers.h
--- plugins/check_curl.d/check_curl_helpers.h.orig
+++ plugins/check_curl.d/check_curl_helpers.h
@@ -80,7 +80,7 @@ check_curl_configure_curl_wrapper check_curl_configure
 															check_curl_working_state working_state,
 															bool check_cert,
 															bool on_redirect_dependent,
-															int follow_method, int max_depth);
+															int follow_method, long max_depth);
 
 void handle_curl_option_return_code(CURLcode res, const char *option);
 
