fixed compiler warnings

examples/z1/test-adxl345.c

@@ -43,7 +43,10 @@
 #include <stdio.h>
 #include "contiki.h"
 #include "serial-shell.h"
-#include "adxl345.h"
+#include "shell-ps.h"
+#include "shell-file.h"
+#include "shell-text.h"
+#include "dev/adxl345.h"
 
 #define LED_INT_ONTIME        CLOCK_SECOND/2
 #define ACCM_READ_INTERVAL    CLOCK_SECOND

platform/z1/contiki-z1-main.c

@@ -45,6 +45,7 @@
 #include "net/netstack.h"
 #include "net/mac/frame802154.h"
 #include "dev/button-sensor.h"
+#include "dev/adxl345.h"
 
 #if WITH_UIP6
 #include "net/uip-ds6.h"

platform/z1/dev/xmem.c

@@ -189,7 +189,7 @@ xmem_pread(void *_p, int size, unsigned long offset)
   return size;
 }
 /*---------------------------------------------------------------------------*/
-static const char *
+static const unsigned char *
 program_page(unsigned long offset, const unsigned char *p, int nbytes)
 {
   const unsigned char *end = p + nbytes;