Fixed build errors on centos5-amd64-minimal, where we compile with very few character sets

Fixed compiler warnings

client/readline.cc:
  Fixed compiler warning
mysql-test/t/mysqldump.test:
  Only run test if utf8 is used
sql/log.cc:
  Fixed compiler warning
sql/mysql_priv.h:
  Fixed compiler warnings
tests/mysql_client_test.c:
  Don't abort test if ucs2 is not in use.

client/readline.cc

@@ -56,6 +56,7 @@ char *batch_readline(LINE_BUFFER *line_buff)
 {
   char *pos;
   ulong out_length;
+  LINT_INIT(out_length);
 
   if (!(pos=intern_read_line(line_buff, &out_length)))
     return 0;

mysql-test/t/mysqldump.test

@@ -6,6 +6,10 @@ call mtr.add_suppression("@003f.frm' \\(errno: 22\\)");
 # Binlog is required
 --source include/have_log_bin.inc
 
+# utf8 is required
+let collation=utf8_unicode_ci;
+--source include/have_collation.inc
+
 # Save the initial number of concurrent sessions
 --source include/count_sessions.inc
 

sql/log.cc

@@ -1877,6 +1877,7 @@ static int find_uniq_filename(char *name)
   size_t		buf_length, length;
   char			*start, *end;
   DBUG_ENTER("find_uniq_filename");
+  LINT_INIT(number);
 
   length= dirname_part(buff, name, &buf_length);
   start=  name + length;

sql/mysql_priv.h

@@ -909,14 +909,14 @@ struct Query_cache_query_flags
   (((L)->sql_command == SQLCOM_SELECT) && (L)->safe_to_cache_query)
 #else
 #define QUERY_CACHE_FLAGS_SIZE 0
-#define query_cache_store_query(A, B)
-#define query_cache_destroy()
-#define query_cache_result_size_limit(A)
-#define query_cache_init()
-#define query_cache_resize(A)
-#define query_cache_set_min_res_unit(A)
-#define query_cache_invalidate3(A, B, C)
-#define query_cache_invalidate1(A)
+#define query_cache_store_query(A, B)     do { } while(0)
+#define query_cache_destroy()             do { } while(0)
+#define query_cache_result_size_limit(A)  do { } while(0)
+#define query_cache_init()                do { } while(0)
+#define query_cache_resize(A)             do { } while(0)
+#define query_cache_set_min_res_unit(A)   do { } while(0)
+#define query_cache_invalidate3(A, B, C)  do { } while(0)
+#define query_cache_invalidate1(A)        do { } while(0)
 #define query_cache_send_result_to_client(A, B, C) 0
 #define query_cache_invalidate_by_MyISAM_filename_ref NULL
 

tests/mysql_client_test.c

@@ -18466,7 +18466,8 @@ static void test_bug58036()
   if (!opt_silent)
     printf("Got mysql_real_connect() error (expected): %s (%d)\n",
            mysql_error(conn), mysql_errno(conn));  
-  DIE_UNLESS(mysql_errno(conn) == ER_WRONG_VALUE_FOR_VAR);
+  DIE_UNLESS(mysql_errno(conn) == ER_WRONG_VALUE_FOR_VAR ||
+             mysql_errno(conn)== CR_CANT_READ_CHARSET);
   mysql_close(conn);