fixed configuration to build properly on portenta
#define OMV_FB_SIZE (4M) // FB memory: header + VGA/GS image
#define OMV_FB_ALLOC_SIZE (3M) // minimum fb alloc size
#define OMV_STACK_SIZE (15K)
-#define OMV_HEAP_SIZE (228K)
+#define OMV_HEAP_SIZE (226K)
#define OMV_SDRAM_SIZE (8 * 1024 * 1024) // This needs to be here for UVC firmware.
#define OMV_SDRAM_TEST (0)
