Handle escaped nulls

Ensure \0 is escaped to \\0 rather than being converted to NULL

Author: xoozoo

source code/MySqlBackup(Devart-Express)/Methods/QueryExpress.cs

@@ -92,6 +92,9 @@ static void escape_string(StringBuilder sb, char c)
                 case '\\': // Backslash
                     sb.AppendFormat("\\\\");
                     break;
+                case '\0': // Null
+                    sb.AppendFormat("\\0");
+                    break;
                 case '\r': // Carriage return
                     sb.AppendFormat("\\r");
                     break;

source code/MySqlBackup(MySql.Data)/Methods/QueryExpress.cs

@@ -91,6 +91,9 @@ static void escape_string(StringBuilder sb, char c)
                 case '\\': // Backslash
                     sb.AppendFormat("\\\\");
                     break;
+                case '\0': // Null
+                    sb.AppendFormat("\\0");
+                    break;
                 case '\r': // Carriage return
                     sb.AppendFormat("\\r");
                     break;

source code/MySqlBackup(MySqlConnector)/Methods/QueryExpress.cs

@@ -91,6 +91,9 @@ static void escape_string(StringBuilder sb, char c)
                 case '\\': // Backslash
                     sb.AppendFormat("\\\\");
                     break;
+                case '\0': // Null
+                    sb.AppendFormat("\\0");
+                    break;
                 case '\r': // Carriage return
                     sb.AppendFormat("\\r");
                     break;