Fix C90 Compilation Failure (#359)

This issue was reported here: https://github.com/FreeRTOS/FreeRTOS-Kernel/issues/358

Signed-off-by: Gaurav Aggarwal <aggarg@amazon.com>
diff --git a/event_groups.c b/event_groups.c
index 510ea3a..9abfada 100644
--- a/event_groups.c
+++ b/event_groups.c
@@ -627,10 +627,12 @@
 

 void vEventGroupDelete( EventGroupHandle_t xEventGroup )

 {

-    configASSERT( xEventGroup );

-

     EventGroup_t * pxEventBits = xEventGroup;

-    const List_t * pxTasksWaitingForBits = &( pxEventBits->xTasksWaitingForBits );

+    const List_t * pxTasksWaitingForBits;

+

+    configASSERT( pxEventBits );

+

+    pxTasksWaitingForBits = &( pxEventBits->xTasksWaitingForBits );

 

     vTaskSuspendAll();

     {