CDRIVER-366: Update examples to compile using C++ compiler

Author: bjori

examples/example-scram.c

@@ -71,7 +71,7 @@ main (int   argc,
 
    collection = mongoc_client_get_collection (client, "test", "test");
 
-   cursor = mongoc_collection_find (collection, 0, 0, 0, 0, &query, NULL, NULL);
+   cursor = mongoc_collection_find (collection, (mongoc_query_flags_t)0, 0, 0, 0, &query, NULL, NULL);
 
    mongoc_cursor_next (cursor, &doc);
 

examples/mongoc-ping.c

@@ -58,7 +58,7 @@ main (int   argc,
    bson_init(&ping);
    bson_append_int32(&ping, "ping", 4, 1);
    database = mongoc_client_get_database(client, "test");
-   cursor = mongoc_database_command(database, 0, 0, 1, 0, &ping, NULL, NULL);
+   cursor = mongoc_database_command(database, (mongoc_query_flags_t)0, 0, 1, 0, &ping, NULL, NULL);
    if (mongoc_cursor_next(cursor, &reply)) {
       str = bson_as_json(reply, NULL);
       fprintf(stdout, "%s\n", str);

examples/mongoc-rpc-validate.c

@@ -67,7 +67,7 @@ validate (const char *name) /* IN */
       exit (EXIT_FAILURE);
    }
 
-   buf = bson_malloc (st.st_size);
+   buf = (uint8_t *)bson_malloc (st.st_size);
    if (buf == NULL) {
       fprintf (stderr, "%s: Failed to malloc %d bytes.\n",
                name, (int)st.st_size);

examples/mongoc-tail.c

@@ -26,6 +26,9 @@ query_collection (mongoc_collection_t *collection,
    mongoc_cursor_t *cursor;
    bson_t query;
    bson_t gt;
+   int fflags = (MONGOC_QUERY_TAILABLE_CURSOR
+         | MONGOC_QUERY_AWAIT_DATA
+         | MONGOC_QUERY_SLAVE_OK);
 
    BSON_ASSERT(collection);
 
@@ -35,9 +38,7 @@ query_collection (mongoc_collection_t *collection,
    bson_append_document_end(&query, &gt);
 
    cursor = mongoc_collection_find(collection,
-                                   (MONGOC_QUERY_TAILABLE_CURSOR |
-                                    MONGOC_QUERY_AWAIT_DATA |
-                                    MONGOC_QUERY_SLAVE_OK),
+                                   (mongoc_query_flags_t)fflags,
                                    0,
                                    0,
                                    0,