Require Audacity.h before Experimental.h...

... so that USE_* macros will be seen first, and so
EXPERIMENTAL_AUTOMATED_INPUT_LEVEL_ADJUSTMENT, for one, is correctly defined.

I hesitated actually to include Audacity.h in Experimental.h.  Maybe no
need for that hesitancy.  But instead I use #error if Audacity.h has not been
seen yet.

src/Experimental.h

@@ -30,6 +30,11 @@
 #ifndef __EXPERIMENTAL__
 #define __EXPERIMENTAL__
 
+#ifndef __AUDACITY_H__
+// Audacity.h is needed for the USE_* macros
+#error Must include Audacity.h before Experimental.h
+#endif
+
 // ACH 08 Jan 2014
 // EQ accelerated code
 //#define EXPERIMENTAL_EQ_SSE_THREADED

src/menus/FileMenus.cpp

@@ -1,3 +1,4 @@
+#include "../Audacity.h" // for USE_* macros
 #include "../Experimental.h"
 
 #include "../AudacityApp.h"

src/menus/HelpMenus.cpp

@@ -1,3 +1,4 @@
+#include "../Audacity.h"
 #include "../Experimental.h"
 
 #include "../AboutDialog.h"

src/menus/PluginMenus.cpp

@@ -1,3 +1,4 @@
+#include "../Audacity.h"
 #include "../Experimental.h"
 
 #include "../AudacityApp.h"

src/menus/SelectMenus.cpp

@@ -1,3 +1,4 @@
+#include "../Audacity.h"
 #include "../Experimental.h"
 
 #include "../AdornedRulerPanel.h"

src/menus/ToolbarMenus.cpp

@@ -1,3 +1,4 @@
+#include "../Audacity.h"
 #include "../Experimental.h"
 
 #include "../Menus.h"

src/menus/TrackMenus.cpp

@@ -1,3 +1,4 @@
+#include "../Audacity.h"
 #include "../Experimental.h"
 
 #include "../AudacityApp.h"

src/menus/TransportMenus.cpp

@@ -1,3 +1,4 @@
+#include "../Audacity.h"
 #include "../Experimental.h"
 
 #include "../AdornedRulerPanel.h"

src/menus/ViewMenus.cpp

@@ -1,3 +1,4 @@
+#include "../Audacity.h"
 #include "../Experimental.h"
 
 #include "../HistoryWindow.h"