regedit: Stop exporting REG_SZ data at the first NUL character.

programs/regedit/regproc.c

@@ -1171,7 +1171,10 @@ static WCHAR *REGPROC_escape_string(WCHAR *str, size_t str_len, size_t *line_len
     for (i = 0, escape_count = 0; i < str_len; i++)
     {
         WCHAR c = str[i];
-        if (c == '\r' || c == '\n' || c == '\\' || c == '"' || c == '\0')
+
+        if (!c) break;
+
+        if (c == '\r' || c == '\n' || c == '\\' || c == '"')
             escape_count++;
     }
 
@@ -1181,6 +1184,8 @@ static WCHAR *REGPROC_escape_string(WCHAR *str, size_t str_len, size_t *line_len
     {
         WCHAR c = str[i];
 
+        if (!c) break;
+
         switch (c)
         {
         case '\r':
@@ -1199,10 +1204,6 @@ static WCHAR *REGPROC_escape_string(WCHAR *str, size_t str_len, size_t *line_len
             buf[pos++] = '\\';
             buf[pos] = '"';
             break;
-        case '\0':
-            buf[pos++] = '\\';
-            buf[pos] = '0';
-            break;
         default:
             buf[pos] = c;
         }

programs/regedit/tests/regedit.c

@@ -3688,7 +3688,7 @@ static void test_export(void)
     RegCloseKey(hkey);
 
     run_regedit_exe("regedit.exe /e file.reg HKEY_CURRENT_USER\\" KEY_BASE);
-    ok(compare_export("file.reg", embedded_null_test, TODO_REG_COMPARE), "compare_export() failed\n");
+    ok(compare_export("file.reg", embedded_null_test, 0), "compare_export() failed\n");
 
     delete_key(HKEY_CURRENT_USER, KEY_BASE);
 }