compiler warning: fix

Fix compiler warning: enumerated type mixed with another type

lib/asyn-ares.c

@@ -140,7 +140,7 @@ void Curl_resolver_global_cleanup(void)
  * URL-state specific environment ('resolver' member of the UrlState
  * structure).  Fills the passed pointer by the initialized ares_channel.
  */
-int Curl_resolver_init(void **resolver)
+CURLcode Curl_resolver_init(void **resolver)
 {
   int status = ares_init((ares_channel*)resolver);
   if(status != ARES_SUCCESS) {

lib/asyn-thread.c

@@ -119,7 +119,7 @@ void Curl_resolver_global_cleanup(void)
  * URL-state specific environment ('resolver' member of the UrlState
  * structure).  Does nothing here.
  */
-int Curl_resolver_init(void **resolver)
+CURLcode Curl_resolver_init(void **resolver)
 {
   (void)resolver;
   return CURLE_OK;

lib/asyn.h

@@ -60,7 +60,7 @@ void Curl_resolver_global_cleanup(void);
  * Returning anything else than CURLE_OK fails curl_easy_init() with the
  * correspondent code.
  */
-int Curl_resolver_init(void **resolver);
+CURLcode Curl_resolver_init(void **resolver);
 
 /*
  * Curl_resolver_cleanup()

lib/url.c

@@ -765,7 +765,7 @@ CURLcode Curl_open(struct SessionHandle **curl)
 {
   CURLcode res = CURLE_OK;
   struct SessionHandle *data;
-  int status;
+  CURLcode status;
 
   /* Very simple start-up: alloc the struct, init it with zeroes and return */
   data = calloc(1, sizeof(struct SessionHandle));