Fix incorrect spellings of "dropped" in source and tests. (Bug #12828)

include/my_alloc.h:
  Fix incorrect spelling
mysql-test/t/rpl000009.test:
  Fix incorrect spelling
mysql-test/t/system_mysql_db_fix.test:
  Fix incorrect spelling
sql/sql_table.cc:
  Fix incorrect spelling
tests/mysql_client_test.c:
  Fix incorrect spelling

include/my_alloc.h

@@ -43,7 +43,7 @@ typedef struct st_mem_root
   unsigned int block_num;          /* allocated blocks counter */
   /* 
      first free block in queue test counter (if it exceed 
-     MAX_BLOCK_USAGE_BEFORE_DROP block will be droped in 'used' list)
+     MAX_BLOCK_USAGE_BEFORE_DROP block will be dropped in 'used' list)
   */
   unsigned int first_block_usage;
 

mysql-test/t/rpl000009.test

@@ -167,7 +167,7 @@ drop database mysqltest2;
 save_master_pos;
 connection slave;
 sync_with_master;
-# These has to be droped on slave as they are not replicated
+# These have to be dropped on slave because they are not replicated
 drop database mysqltest2;
 drop database mysqltest3;
 

mysql-test/t/system_mysql_db_fix.test

@@ -81,7 +81,7 @@ DROP TABLE db, host, user, func, tables_priv, columns_priv, help_category, help_
 
 -- enable_query_log
 
-# check that we droped all system tables
+# check that we dropped all system tables
 show tables;
 
 # End of 4.1 tests

sql/sql_table.cc

@@ -2948,7 +2948,7 @@ int mysql_alter_table(THD *thd,char *new_db, char *new_name,
   Field **f_ptr,*field;
   for (f_ptr=table->field ; (field= *f_ptr) ; f_ptr++)
   {
-    /* Check if field should be droped */
+    /* Check if field should be dropped */
     Alter_drop *drop;
     drop_it.rewind();
     while ((drop=drop_it++))

tests/mysql_client_test.c

@@ -9177,7 +9177,7 @@ static void test_create_drop()
     rc= mysql_stmt_execute(stmt_drop);
     check_execute(stmt_drop, rc);
     if (!opt_silent)
-      fprintf(stdout, "droped %i\n", i);
+      fprintf(stdout, "dropped %i\n", i);
 
     rc= mysql_stmt_execute(stmt_create_select);
     check_execute(stmt_create, rc);
@@ -9192,7 +9192,7 @@ static void test_create_drop()
     rc= mysql_stmt_execute(stmt_drop);
     check_execute(stmt_drop, rc);
     if (!opt_silent)
-      fprintf(stdout, "droped %i\n", i);
+      fprintf(stdout, "dropped %i\n", i);
   }
 
   mysql_stmt_close(stmt_create);