Make more human readable and maintainable previous

compiler warning fix since it was Ok and actually
avoids the targeted compiler warning.

1 files changed, 14 insertions, 7 deletions

diff --git a/lib/url.c b/lib/url.c
index 9b9348fd4..6b823df34 100644
--- a/lib/url.c
+++ b/lib/url.c
@@ -165,6 +165,13 @@ static void signalPipeClose(struct curl_llist *pipe);
 
 #define MAX_PIPELINE_LENGTH 5
 
+/* 
+ * We use this ZERO_NULL to avoid picky compiler warnings,
+ * when assigning a NULL pointer to a function pointer var.
+ */
+
+#define ZERO_NULL 0
+
 #ifndef USE_ARES
 /* not for ares builds */
 
@@ -501,9 +508,9 @@ CURLcode Curl_open(struct SessionHandle **curl)
     data->set.fread = (curl_read_callback)fread;
 
     /* conversion callbacks for non-ASCII hosts */
-    data->set.convfromnetwork = (CURLcode(*)(char *, size_t))0;
-    data->set.convtonetwork   = (CURLcode(*)(char *, size_t))0;
-    data->set.convfromutf8    = (CURLcode(*)(char *, size_t))0;
+    data->set.convfromnetwork = (curl_conv_callback)ZERO_NULL;
+    data->set.convtonetwork   = (curl_conv_callback)ZERO_NULL;
+    data->set.convfromutf8    = (curl_conv_callback)ZERO_NULL;
 
 #if defined(CURL_DOES_CONVERSIONS) && defined(HAVE_ICONV)
     /* conversion descriptors for iconv calls */
@@ -2993,7 +3000,7 @@ static CURLcode CreateConnection(struct SessionHandle *data,
     conn->remote_port = PORT_HTTP;
     conn->protocol |= PROT_HTTP;
     conn->curl_do = Curl_http;
-    conn->curl_do_more = (CURLcode(*)(struct connectdata *))0;
+    conn->curl_do_more = (Curl_do_more_func)ZERO_NULL;
     conn->curl_done = Curl_http_done;
     conn->curl_connect = Curl_http_connect;
 #else
@@ -3010,7 +3017,7 @@ static CURLcode CreateConnection(struct SessionHandle *data,
     conn->protocol |= PROT_HTTP|PROT_HTTPS|PROT_SSL;
 
     conn->curl_do = Curl_http;
-    conn->curl_do_more = (CURLcode(*)(struct connectdata *))0;
+    conn->curl_do_more = (Curl_do_more_func)ZERO_NULL;
     conn->curl_done = Curl_http_done;
     conn->curl_connect = Curl_http_connect;
     conn->curl_connecting = Curl_https_connecting;
@@ -3124,7 +3131,7 @@ static CURLcode CreateConnection(struct SessionHandle *data,
     conn->remote_port = PORT_DICT;
     conn->curl_do = Curl_dict;
     /* no DICT-specific done */
-    conn->curl_done = (CURLcode(*)(struct connectdata *, CURLcode))0;
+    conn->curl_done = (Curl_done_func)ZERO_NULL;
 #else
     failf(data, LIBCURL_NAME
           " was built with DICT disabled!");
@@ -3137,7 +3144,7 @@ static CURLcode CreateConnection(struct SessionHandle *data,
     conn->remote_port = PORT_LDAP;
     conn->curl_do = Curl_ldap;
     /* no LDAP-specific done */
-    conn->curl_done = (CURLcode(*)(struct connectdata *, CURLcode))0;
+    conn->curl_done = (Curl_done_func)ZERO_NULL;
 #else
     failf(data, LIBCURL_NAME
           " was built with LDAP disabled!");