Tracepoints: fix ETW generator for pointers

Fixes compilation failure on Windows, due to TraceLoggingValue not
correctly casting pointer arguments to a known type.

Change-Id: I6027debe4ea3440588dd8677209d6d47048b6b0f
Reviewed-by: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>

src/tools/tracegen/etw.cpp

@@ -75,6 +75,9 @@ static void writeEtwMacro(QTextStream &stream, const Tracepoint::Field &field)
                << "TraceLoggingValue(" << name << ".width(), \"width\"), "
                << "TraceLoggingValue(" << name << ".height(), \"height\")";
         return;
+    case Tracepoint::Field::Pointer:
+        stream << "TraceLoggingPointer(" << name << ", \"" << name << "\")";
+        return;
     default:
         break;
     }