LADSPA/CMT: fixed global initialization on Win32

Global initialization happens via a global startup/shutdown handler
instance. For some reason this does not work properly when building
a DLL file, therefore create this startup/shutdown handler instance
as a static variable in ladspa_descriptor().

Furthermore marked ladspa_descriptor as extern-C.

plugins/ladspa_effect/cmt/src/init.cpp

@@ -108,18 +108,26 @@ public:
     finalise_modules();
   }
 
-} g_oStartupShutdownHandler;
+} ;
   
 /*****************************************************************************/
 
+extern "C"
+{
+
 const LADSPA_Descriptor * 
 ladspa_descriptor(unsigned long Index) {
+
+	static StartupShutdownHandler handler;
+
   if (Index < g_lPluginCount)
     return g_ppsRegisteredDescriptors[Index];
   else
     return NULL;
 }
 
+};
+
 /*****************************************************************************/
 
 /* EOF */