(svn r22893) -Fix [FS#4744]: [OSX] Compilation on OSX 10.7 was broken (based on patch by leecbaker)

-Add: [OSX] Support for fullscreen mode when compiled against SDK 10.7. Otherwise fullscreen mode is disabled when OpenTTD is run on OSX Lion

src/os/macosx/macos.h

@@ -29,6 +29,14 @@
 #define MAC_OS_X_VERSION_10_6 1060
 #endif
 
+#ifndef MAC_OS_X_VERSION_10_7
+#define MAC_OS_X_VERSION_10_7 1070
+#endif
+
+#ifndef MAC_OS_X_VERSION_10_8
+#define MAC_OS_X_VERSION_10_8 1080
+#endif
+
 
 /** Helper function displaying a message the best possible way. */
 void ShowMacDialog(const char *title, const char *message, const char *button_label);