Workaround for PPC builds.

modules/juce_gui_basics/native/juce_mac_NSViewComponentPeer.mm

@@ -528,6 +528,7 @@ public:
         wheel.isReversed = false;
         wheel.isSmooth = false;
 
+       #if ! JUCE_PPC
         @try
         {
            #if defined (MAC_OS_X_VERSION_10_7) && MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_7
@@ -555,6 +556,7 @@ public:
         }
         @catch (...)
         {}
+       #endif
 
         if (wheel.deltaX == 0 && wheel.deltaY == 0)
         {