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_sqlite.h

@@ -35,9 +35,7 @@
 #ifndef SWITCH_SQLITE_H
 #define SWITCH_SQLITE_H
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+BEGIN_EXTERN_C
 
 #include <sqlite3.h>
 
@@ -1806,10 +1804,6 @@ DoxyDefine(void switch_core_db_free(char *z);)
 /** @} */
 /** @} */
 
-
-
-#ifdef __cplusplus
-}
-#endif
+END_EXTERN_C
 
 #endif