HAL_VRBRAIN: make available_memory() uint32_t

libraries/AP_HAL_VRBRAIN/Util.cpp

@@ -132,14 +132,9 @@ bool VRBRAINUtil::get_system_id(char buf[40])
 /**
    how much free memory do we have in bytes.
 */
-uint16_t VRBRAINUtil::available_memory(void)
+uint32_t VRBRAINUtil::available_memory(void)
 {
-    struct mallinfo mem;
-    mem = mallinfo();
-    if (mem.fordblks > 0xFFFF) {
-        return 0xFFFF;
-    }
-    return mem.fordblks;
+    return mallinfo(),fordblks;
 }
 
 #endif // CONFIG_HAL_BOARD == HAL_BOARD_VRBRAIN

libraries/AP_HAL_VRBRAIN/Util.h

@@ -22,7 +22,7 @@ public:
      */
     bool get_system_id(char buf[40]);
 
-    uint16_t available_memory(void);
+    uint32_t available_memory(void) override;
 
 private:
     int _safety_handle;