Build broken for gcc 4.5.1 in optimized mode.

readline.cc: In function char* batch_readline(LINE_BUFFER*):
readline.cc:60:9: error: out_length may be used uninitialized in this function
log.cc: In function int find_uniq_filename(char*):
log.cc:1857:8: error: number may be used uninitialized in this function

client/readline.cc

@@ -57,7 +57,7 @@ LINE_BUFFER *batch_readline_init(ulong max_size,FILE *file)
 char *batch_readline(LINE_BUFFER *line_buff)
 {
   char *pos;
-  ulong out_length;
+  ulong out_length= 0;
 
   if (!(pos=intern_read_line(line_buff, &out_length)))
     return 0;

sql/log.cc

@@ -1854,7 +1854,7 @@ static void setup_windows_event_source()
 
 static int find_uniq_filename(char *name)
 {
-  long                  number;
+  long                  number= 0;
   uint                  i;
   char                  buff[FN_REFLEN];
   struct st_my_dir     *dir_info;