(svn r23735) -Codechange: remove ~50 includes from headers that weren't needed

src/widgets/ai_widget.h

@@ -12,6 +12,8 @@
 #ifndef WIDGETS_AI_WIDGET_H
 #define WIDGETS_AI_WIDGET_H
 
+#include "../company_type.h"
+
 /** Widgets of the #AIListWindow class. */
 enum AIListWidgets {
 	WID_AIL_CAPTION,   ///< Caption of the window.

src/widgets/graph_widget.h

@@ -13,6 +13,7 @@
 #define WIDGETS_GRAPH_WIDGET_H
 
 #include "../economy_type.h"
+#include "../company_type.h"
 
 /** Widgets of the #GraphLegendWindow class. */
 enum GraphLegendWidgets {