Fix compile warning in curl_utils.c.

Author: tritao

src/host/curl_utils.c

@@ -36,10 +36,10 @@ int curlProgressCallback(curl_state* state, double dltotal, double dlnow, double
 }
 
 
-size_t curlWriteCallback(char *ptr, size_t size, size_t nmemb, curl_state* state)
+size_t curlWriteCallback(char *ptr, size_t size, size_t nmemb, void* state)
 {
 	size_t length = size * nmemb;
-	premake_buffer_puts(&state->S, ptr, length);
+	premake_buffer_puts(&((curl_state*)state)->S, ptr, length);
 	return length;
 }
 

src/host/curl_utils.h

@@ -30,7 +30,7 @@ int curlProgressCallback(curl_state* state, curl_off_t dltotal, curl_off_t dlnow
 #else
 int curlProgressCallback(curl_state* state, double dltotal, double dlnow, double ultotal, double ulnow);
 #endif
-size_t curlWriteCallback(char *ptr, size_t size, size_t nmemb, curl_state* state);
+size_t curlWriteCallback(char *ptr, size_t size, size_t nmemb, void* state);
 
 CURL*  curlRequest(lua_State* L, curl_state* state, int optionsIndex, int progressFnIndex, int headersIndex);
 void   curlCleanup(CURL* curl, curl_state* state);