Fixed wrong test for extra_ip_sock that caused mysqld to die on Mac if --extra-port was used

sql/sql_string.cc:
  Optimized tests to do fewer reallocs
sql/strfunc.cc:
  Indentation fix

sql/mysqld.cc

@@ -4974,11 +4974,11 @@ inline void kill_broken_server()
 #if !defined(__NETWARE__)
       unix_sock == INVALID_SOCKET ||
 #endif
-      (!opt_disable_networking &&
-       (base_ip_sock == INVALID_SOCKET || extra_ip_sock != INVALID_SOCKET)))
+      (!opt_disable_networking && ip_sock == INVALID_SOCKET))
   {
     select_thread_in_use = 0;
     /* The following call will never return */
+    DBUG_PRINT("general", ("killing server because socket is closed"));
     kill_server(IF_NETWARE(MYSQL_KILL_SIGNAL, (void*) MYSQL_KILL_SIGNAL));
   }
 }

sql/sql_string.cc

@@ -65,10 +65,10 @@ bool String::real_alloc(uint32 arg_length)
 
 bool String::realloc(uint32 alloc_length)
 {
-  uint32 len=ALIGN_SIZE(alloc_length+1);
-  if (Alloced_length < len)
+  if (Alloced_length <= alloc_length)
   {
     char *new_ptr;
+    uint32 len= ALIGN_SIZE(alloc_length+1);
     if (alloced)
     {
       if ((new_ptr= (char*) my_realloc(Ptr,len,MYF(MY_WME))))

sql/strfunc.cc

@@ -38,7 +38,8 @@
 
 static const char field_separator=',';
 
-ulonglong find_set(TYPELIB *lib, const char *str, uint length, CHARSET_INFO *cs,
+ulonglong find_set(TYPELIB *lib, const char *str, uint length,
+                   CHARSET_INFO *cs,
                    char **err_pos, uint *err_len, bool *set_warning)
 {
   CHARSET_INFO *strip= cs ? cs : &my_charset_latin1;