Comparison for strings is always `false` (changed)

[ralphlange]

When comparing old and new value (to decide if a change needs to be logged), the comparison for strings in the non-array case (where the value is actually a char[]) does not compare the strings, but their addresses and will always return false.

caPutLog/caPutLogApp/caPutJsonLogTask.cpp

Line 834 in 51a6c1e

SINGLE_TYPE_COMPARE(string, MAX_STRING_SIZE);

with

caPutLog/caPutLogApp/caPutJsonLogTask.cpp

Lines 797 to 800 in 51a6c1e

	#define SINGLE_TYPE_COMPARE(_t, _s) \
	if (pLogData->is_array) \
	return memcmp(pa->a_##_t, pb->a_##_t, size * _s) == 0; \
	return pa->v_##_t == pb->v_##_t;

This is not serious, as it only leads to string puts always triggering a log, i.e. additional log messages.

There is no test that would catch the faulty behavior. (Tests only check that changing data triggers log messages. )