Update ppport.h to not cause warnings with newest Perl versions.

tglsfdc · tglsfdc · commit d898de1f3b18 · 2006-05-30T15:48:20.000Z
This is just the minimal necessary change; we might want to adopt
later PPPort output instead.
diff --git a/src/pl/plperl/ppport.h b/src/pl/plperl/ppport.h
@@ -221,6 +221,7 @@ __DATA__
 /* Replace: 0 */
 #endif
 
+#ifndef PERL_UNUSED_DECL
 #ifdef HASATTRIBUTE
 #if (defined(__GNUC__) && defined(__cplusplus)) || defined(__INTEL_COMPILER)
 #define PERL_UNUSED_DECL
@@ -230,6 +231,7 @@ __DATA__
 #else
 #define PERL_UNUSED_DECL
 #endif
+#endif
 
 #ifndef dNOOP
 #define NOOP (void)0
