fix leak in test_init (#440)

Signed-off-by: Abby Xu <abbyxu@amazon.com>

rcl/test/rcl/test_init.cpp

@@ -57,7 +57,7 @@ class CLASSNAME (TestRCLFixture, RMW_IMPLEMENTATION) : public ::testing::Test
 struct FakeTestArgv
 {
   FakeTestArgv()
-  : allocator(rcutils_get_default_allocator()), argc(2)
+  : allocator(rcl_get_default_allocator()), argc(2)
   {
     this->argv =
       static_cast<char **>(allocator.allocate(2 * sizeof(char *), allocator.state));
@@ -82,15 +82,15 @@ struct FakeTestArgv
     if (this->argv) {
       if (this->argc > 0) {
         size_t unsigned_argc = this->argc;
-        for (size_t i = 0; i < unsigned_argc; --i) {
+        for (size_t i = 0; i < unsigned_argc; ++i) {
           allocator.deallocate(this->argv[i], allocator.state);
         }
       }
     }
     allocator.deallocate(this->argv, allocator.state);
   }
 
-  rcutils_allocator_t allocator;
+  rcl_allocator_t allocator;
   int argc;
   char ** argv;
 
@@ -201,6 +201,9 @@ TEST_F(CLASSNAME(TestRCLFixture, RMW_IMPLEMENTATION), test_rcl_init_and_ok_and_s
   ret = rcl_context_fini(&context);
   EXPECT_EQ(ret, RCL_RET_OK);
   context = rcl_get_zero_initialized_context();
+  OSRF_TESTING_TOOLS_CPP_SCOPE_EXIT({
+    EXPECT_EQ(RCL_RET_OK, rcl_init_options_fini(&init_options)) << rcl_get_error_string().str;
+  });
 }
 
 /* Tests the rcl_get_instance_id() and rcl_ok() functions.