Merge from 4.1: fix for bug #7285 (embedded server)

BitKeeper/etc/logging_ok

@@ -43,6 +43,7 @@ dlenev@jabberwock.localdomain
 dlenev@mysql.com
 ejonore@mc03.ndb.mysql.com
 georg@beethoven.local
+georg@beethoven.site
 gerberb@ou800.zenez.com
 gluh@gluh.(none)
 gluh@gluh.mysql.r18.ru

libmysql/libmysql.c

@@ -158,7 +158,8 @@ int STDCALL mysql_server_init(int argc __attribute__((unused)),
     (void) signal(SIGPIPE, SIG_IGN);
 #endif
 #ifdef EMBEDDED_LIBRARY
-    result= init_embedded_server(argc, argv, groups);
+    if (argc > -1)
+      result= init_embedded_server(argc, argv, groups);
 #endif
   }
 #ifdef THREAD