try to fix windows build issue

Signed-off-by: Gavin Halliday <[email protected]>

system/jlib/jtrace.cpp

@@ -50,6 +50,9 @@
 #include "lnuid.h"
 #include <variant>
 
+//This seems to be defined in some window builds - avoid conflicts with the functions below
+#undef max
+
 namespace context     = opentelemetry::context;
 namespace nostd       = opentelemetry::nostd;
 namespace opentel_trace = opentelemetry::trace;