Cast away a few unused return types to ensure lint/compilers don't generate warnings when the warning level is high.

FreeRTOS/Source/croutine.c

@@ -292,7 +292,7 @@ CRCB_t *pxCRCB;
 				have been moved to the pending ready list and the following
 				line is still valid.  Also the pvContainer parameter will have
 				been set to NULL so the following lines are also valid. */
-				uxListRemove( &( pxCRCB->xGenericListItem ) );
+				( void ) uxListRemove( &( pxCRCB->xGenericListItem ) );
 
 				/* Is the co-routine waiting on an event also? */
 				if( pxCRCB->xEventListItem.pvContainer )

FreeRTOS/Source/portable/MemMang/heap_1.c

@@ -126,7 +126,7 @@ static uint8_t *pucAlignedHeap = NULL;
 
 		traceMALLOC( pvReturn, xWantedSize );
 	}
-	xTaskResumeAll();
+	( void ) xTaskResumeAll();
 
 	#if( configUSE_MALLOC_FAILED_HOOK == 1 )
 	{

FreeRTOS/Source/portable/MemMang/heap_2.c

@@ -218,7 +218,7 @@ void *pvReturn = NULL;
 
 		traceMALLOC( pvReturn, xWantedSize );
 	}
-	xTaskResumeAll();
+	( void ) xTaskResumeAll();
 
 	#if( configUSE_MALLOC_FAILED_HOOK == 1 )
 	{
@@ -256,7 +256,7 @@ BlockLink_t *pxLink;
 			xFreeBytesRemaining += pxLink->xBlockSize;
 			traceFREE( pv, pxLink->xBlockSize );
 		}
-		xTaskResumeAll();
+		( void ) xTaskResumeAll();
 	}
 }
 /*-----------------------------------------------------------*/

FreeRTOS/Source/portable/MemMang/heap_3.c

@@ -98,7 +98,7 @@ void *pvReturn;
 		pvReturn = malloc( xWantedSize );
 		traceMALLOC( pvReturn, xWantedSize );
 	}
-	xTaskResumeAll();
+	( void ) xTaskResumeAll();
 
 	#if( configUSE_MALLOC_FAILED_HOOK == 1 )
 	{
@@ -123,7 +123,7 @@ void vPortFree( void *pv )
 			free( pv );
 			traceFREE( pv, 0 );
 		}
-		xTaskResumeAll();
+		( void ) xTaskResumeAll();
 	}
 }
 

FreeRTOS/Source/portable/MemMang/heap_4.c

@@ -271,7 +271,7 @@ void *pvReturn = NULL;
 
 		traceMALLOC( pvReturn, xWantedSize );
 	}
-	xTaskResumeAll();
+	( void ) xTaskResumeAll();
 
 	#if( configUSE_MALLOC_FAILED_HOOK == 1 )
 	{
@@ -324,7 +324,7 @@ BlockLink_t *pxLink;
 					traceFREE( pv, pxLink->xBlockSize );
 					prvInsertBlockIntoFreeList( ( ( BlockLink_t * ) pxLink ) );
 				}
-				xTaskResumeAll();
+				( void ) xTaskResumeAll();
 			}
 			else
 			{