A fix and a test case for Bug#16144 "mysql_stmt_attr_get type error":

use the right type in mysql_stmt_attr_get

libmysql/libmysql.c

@@ -2733,7 +2733,7 @@ my_bool STDCALL mysql_stmt_attr_get(MYSQL_STMT *stmt,
 {
   switch (attr_type) {
   case STMT_ATTR_UPDATE_MAX_LENGTH:
-    *(unsigned long *) value= stmt->update_max_length;
+    *(my_bool*) value= stmt->update_max_length;
     break;
   default:
     return TRUE;

tests/mysql_client_test.c

@@ -11753,6 +11753,25 @@ static void test_bug12925()
 }
 
 
+/* Bug #16144: mysql_stmt_attr_get type error */
+
+static void test_bug16144()
+{
+  const my_bool flag_orig= (my_bool) 0xde;
+  my_bool flag= flag_orig;
+  MYSQL_STMT *stmt;
+  myheader("test_bug16144");
+
+  /* Check that attr_get returns correct data on little and big endian CPUs */
+  stmt= mysql_stmt_init(mysql);
+  mysql_stmt_attr_set(stmt, STMT_ATTR_UPDATE_MAX_LENGTH, (const void*) &flag);
+  mysql_stmt_attr_get(stmt, STMT_ATTR_UPDATE_MAX_LENGTH, (void*) &flag);
+  DIE_UNLESS(flag == flag_orig);
+
+  mysql_stmt_close(stmt);
+}
+
+
 /*
   Read and parse arguments and MySQL options from my.cnf
 */
@@ -11974,6 +11993,7 @@ static struct my_tests_st my_tests[]= {
   { "test_bug12001", test_bug12001 },
   { "test_bug11718", test_bug11718 },
   { "test_bug12925", test_bug12925 },
+  { "test_bug16144", test_bug16144 },
   { 0, 0 }
 };