Fix gcc warning about VLA

TIL: const are not really const in C

Author: stephane

tests/unit-test.h.in

@@ -27,8 +27,8 @@
 #define SERVER_ID         17
 #define INVALID_SERVER_ID 18
 
+#define UT_BITS_NB 0x25
 const uint16_t UT_BITS_ADDRESS = 0x130;
-const uint16_t UT_BITS_NB = 0x25;
 const uint8_t UT_BITS_TAB[] = { 0xCD, 0x6B, 0xB2, 0x0E, 0x1B };
 const uint16_t UT_BITS_ADDRESS_INVALID_REQUEST_LENGTH = UT_BITS_ADDRESS + 2;