fix: disable dcb encoding when dictionary loading fails

Author: kjdev

brotli.c

@@ -376,6 +376,7 @@ static zend_string *php_brotli_output_handler_load_dict(php_brotli_context *ctx)
 {
     char *file = BROTLI_G(output_compression_dict);
     if (!file || strlen(file) == 0) {
+        BROTLI_G(compression_coding) &= ~PHP_BROTLI_ENCODING_DCB;
         return NULL;
     }
 
@@ -392,6 +393,7 @@ static zend_string *php_brotli_output_handler_load_dict(php_brotli_context *ctx)
     if (!stream) {
         php_error_docref(NULL, E_WARNING,
                          "brotli: failed to load dictionary");
+        BROTLI_G(compression_coding) &= ~PHP_BROTLI_ENCODING_DCB;
         return NULL;
     }
 
@@ -417,6 +419,7 @@ static zend_string *php_brotli_output_handler_load_dict(php_brotli_context *ctx)
     php_stream_close(stream);
 
     if (!dict) {
+        BROTLI_G(compression_coding) &= ~PHP_BROTLI_ENCODING_DCB;
         return NULL;
     }