Fix. Warnings on MinGW

Author: moteus

src/lceasy.c

@@ -410,7 +410,7 @@ static int lcurl_easy_unset_HTTPPOST(lua_State *L){
  we also unset it to be sure that there no way to
  call default curl reader with our READDATA
  */
- curl_easy_setopt(p->curl, CURLOPT_READFUNCTION, 0);
+ curl_easy_setopt(p->curl, CURLOPT_READFUNCTION, (void*)0);
  curl_easy_setopt(p->curl, CURLOPT_READDATA, 0);
  }
  lcurl_storage_remove_i(L, p->storage, CURLOPT_HTTPPOST);

src/lcutils.h

@@ -16,7 +16,8 @@
 #define LCURL_MAKE_VERSION(MIN, MAJ, PAT) ((MIN<<16) + (MAJ<<8) + PAT)
 #define LCURL_CURL_VER_GE(MIN, MAJ, PAT) (LIBCURL_VERSION_NUM >= LCURL_MAKE_VERSION(MIN, MAJ, PAT))
 
-#define LCURL_STATIC_ASSERT(A) {(int(*)[(A)?1:0])0;}
+//! @fixme on mingw32 (gcc 4.8.1) this does not work
+#define LCURL_STATIC_ASSERT(A) {(void)(int(*)[(A)?1:0])0;}
 
 typedef struct lcurl_const_tag{
  const char *name;