Compile the DebugEventInjector code always, not only when OSL_DEBUG_LEVEL > 0

Otherwise if you happen to compile vcl/source/app/svmain.cxx with
OSL_DEBUG_LEVEL > 0 but not this file, you get an undefined symbol
DebugEventInjector::getCreate().

In general I think our intent is that ideally it should be possible to
compile an arbitrary selection of source files with OSL_DEBUG_LEVEL=0,
and others with OSL_DEBUG_LEVEL=1. (For debugging functionality that
does require consistency across the codebase, we have DBG_UTIL.)

Note that DebugEventInjector::getCreate() will be called from
InitVCL() only when svmain.cxx is compiled with OSL_DEBUG_LEVEL > 0,
though. So for a "production" build with no debug compilation, this
change has no run-time effect.

Change-Id: I3411edfbbbaae21561363634e5eec5ac0cf53418
Reviewed-on: https://gerrit.libreoffice.org/71757
Tested-by: Jenkins
Reviewed-by: Tor Lillqvist <tml@collabora.com>

include/vcl/debugevent.hxx

@@ -10,8 +10,6 @@
 #ifndef INCLUDED_VCL_DEBUGEVENT_HXX
 #define INCLUDED_VCL_DEBUGEVENT_HXX
 
-#if OSL_DEBUG_LEVEL > 0
-
 #include <vcl/dllapi.h>
 #include <vcl/timer.hxx>
 #include <sal/types.h>
@@ -33,8 +31,6 @@ class VCL_DLLPUBLIC DebugEventInjector : private Timer {
      static DebugEventInjector *getCreate();
 };
 
-#endif // OSL_DEBUG_LEVEL > 0
-
 #endif // INCLUDED_VCL_DEBUGEVENT_HXX
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

vcl/source/window/debugevent.cxx

@@ -20,8 +20,6 @@
 #include <window.h>
 #include <salwtype.hxx>
 
-#if OSL_DEBUG_LEVEL > 0
-
 DebugEventInjector::DebugEventInjector( sal_uInt32 nMaxEvents) :
       Timer("debug event injector")
     , mnEventsLeft( nMaxEvents )
@@ -273,6 +271,4 @@ DebugEventInjector *DebugEventInjector::getCreate()
         return nullptr;
 }
 
-#endif // OSL_DEBUG_LEVEL > 0
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */