Empty lines after local variable declarations

[Leif Hedstrom]

This might sound petty, but I really much prefer that we consistently put empty 
lines after local variable declarations. We do so much of the time, but 
definitely not consistently. Besides looking cleaner, doing this consistently 
really helps making clang-format not indent code stupidly.

For example, without the empty line we get

  if (auto it = g_records_ht.find(name); it != g_records_ht.end()) {
    RecRecord *r = it->second;
    *buf         = (char *)ats_malloc(sizeof(char) * 1024);



Note how clang-format will align the =’s, even though they really aren’t 
related.  Whereas with the empty line, it looks a lot nicer as

  if (auto it = g_records_ht.find(name); it != g_records_ht.end()) {
    RecRecord *r = it->second;

    *buf = (char *)ats_malloc(sizeof(char) * 1024);



My $0.01 of the day.

— Leif