more literals, use some in PIP, small refactor PIThread::start (clang-format mistakes)

libs/main/io_devices/pisharedmemory.cpp

@@ -20,6 +20,7 @@
 #include "pisharedmemory.h"
 
 #include "piincludes_p.h"
+#include "piliterals.h"
 #include "pipropertystorage.h"
 #if defined(LINUX) || defined(MAC_OS)
 #  define SHM_POSIX
@@ -77,7 +78,7 @@ PRIVATE_DEFINITION_END(PISharedMemory)
 
 PISharedMemory::PISharedMemory(): PIIODevice() {
 	initPrivate();
-	dsize = 65536;
+	dsize = 64_KiB;
 }