--- a/lib-src/libnyquist/nyquist/xlisp/xlbfun.c
+++ b/lib-src/libnyquist/nyquist/xlisp/xlbfun.c
@@ -603,7 +603,10 @@
 {
     xllastarg();
     xlcleanup();
-    /* compiler might (wrongly) complain there is no return value */
+    /* this point will never be reached because xlcleanup() does a
+       longjmp(). The return is added to avoid false positive 
+       error messages from static analyzers and compilers */
+    return (NIL);
 }
 
 /* xtoplevel - special form 'top-level' */
--- a/src/PluginManager.h
+++ b/src/PluginManager.h
@@ -161,7 +161,6 @@
 
 typedef wxArrayString PluginIDList;
 
-class ProviderMap;
 class PluginRegistrationDialog;
 
 class PluginManager : public PluginManagerInterface