use macro for EXTERN "C" begin and end lines in header files to clean up the headers, and to eliminate a format bug in emacs.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@1291 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/include/switch_loadable_module.h

@@ -41,12 +41,10 @@
 #ifndef SWITCH_LOADABLE_MODULE_H
 #define SWITCH_LOADABLE_MODULE_H
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 #include <switch.h>
 
+BEGIN_EXTERN_C
+
 /*!
   \defgroup mods Loadable Module Functions
   \ingroup core1
@@ -240,8 +238,6 @@ SWITCH_MOD_DECLARE(switch_status) switch_module_runtime(void);
 SWITCH_MOD_DECLARE(switch_status) switch_module_shutdown(void);
 ///\}
 
-#ifdef __cplusplus
-}
-#endif
+END_EXTERN_C
 
 #endif