Change structs to unions to save a few bytes.  Normally unions are against the coding standard but in this case they are permitted as their use is purely to ensure byte alignment.

Source/portable/MemMang/heap_1.c

diff --git a/Source/portable/MemMang/heap_1.c b/Source/portable/MemMang/heap_1.c
index e9d1fe6..3b14e57 100644
--- a/Source/portable/MemMang/heap_1.c
+++ b/Source/portable/MemMang/heap_1.c
@@ -98,7 +98,7 @@
 

 /* Allocate the memory for the heap.  The struct is used to force byte

 alignment without using any non-portable code. */

-static struct xRTOS_HEAP

+static union xRTOS_HEAP

 {

 	unsigned portLONG ulDummy;

 	unsigned portCHAR ucHeap[ configTOTAL_HEAP_SIZE ];

Source/portable/MemMang/heap_2.c

diff --git a/Source/portable/MemMang/heap_2.c b/Source/portable/MemMang/heap_2.c
index eef5bc0..87c1149 100644
--- a/Source/portable/MemMang/heap_2.c
+++ b/Source/portable/MemMang/heap_2.c
@@ -86,7 +86,7 @@
 

 /* Allocate the memory for the heap.  The struct is used to force byte

 alignment without using any non-portable code. */

-static struct xRTOS_HEAP

+static union xRTOS_HEAP

 {

 	unsigned portLONG ulDummy;

 	unsigned portCHAR ucHeap[ configTOTAL_HEAP_SIZE ];