AP_HAL_ChibiOS: assert that storage size is an even number of storage-lines

libraries/AP_HAL_ChibiOS/Storage.h

@@ -34,6 +34,9 @@
 #define CH_STORAGE_LINE_SIZE (1<<CH_STORAGE_LINE_SHIFT)
 #define CH_STORAGE_NUM_LINES (CH_STORAGE_SIZE/CH_STORAGE_LINE_SIZE)
 
+static_assert(CH_STORAGE_SIZE % CH_STORAGE_LINE_SIZE == 0,
+              "Storage is not multiple of line size");
+
 class ChibiOS::Storage : public AP_HAL::Storage {
 public:
     void init() override {}