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_config.h

@@ -56,12 +56,10 @@
 #ifndef SWITCH_CONFIG_H
 #define SWITCH_CONFIG_H
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 #include <switch.h>
 
+BEGIN_EXTERN_C
+
 /*! \brief A simple file handle representing an open configuration file **/
 struct switch_config {
 	/*! FILE stream buffer to the opened file */
@@ -106,9 +104,8 @@ SWITCH_DECLARE(void) switch_config_close_file(switch_config *cfg);
 */
 SWITCH_DECLARE(int) switch_config_next_pair(switch_config *cfg, char **var, char **val);
 
-#ifdef __cplusplus
-}
-#endif
+END_EXTERN_C
+
 /** @} */
 
 #endif