np_sdk: fix -Wundef

Change-Id: Id806e33457ff0c828f55db1fe5e5444e208d2a1e

np_sdk/inc/npapi.h

@@ -384,7 +384,7 @@ typedef enum {
   , NPPVpluginCoreAnimationLayer = 1003
 #endif
 
-#if (MOZ_PLATFORM_MAEMO == 5) || (MOZ_PLATFORM_MAEMO == 6)
+#if defined(MOZ_PLATFORM_MAEMO) && ((MOZ_PLATFORM_MAEMO == 5) || (MOZ_PLATFORM_MAEMO == 6))
   , NPPVpluginWindowlessLocalBool = 2002
 #endif
 } NPPVariable;
@@ -435,7 +435,7 @@ typedef enum {
   , NPNVsupportsUpdatedCocoaTextInputBool = 3002 /* TRUE if the browser supports the updated
                                                     Cocoa text input specification. */
 #endif
-#if (MOZ_PLATFORM_MAEMO == 5) || (MOZ_PLATFORM_MAEMO == 6)
+#if defined(MOZ_PLATFORM_MAEMO) && ((MOZ_PLATFORM_MAEMO == 5) || (MOZ_PLATFORM_MAEMO == 6))
   , NPNVSupportsWindowlessLocal = 2002
 #endif
 } NPNVariable;