fix bug in handling of --input-size

src/flac/main.c

@@ -1535,13 +1535,15 @@ int encode_file(const char *infilename, FLAC__bool is_first_file, FLAC__bool is_
 		}
 	}
 
-	if(option_values.format_input_size >= 0 && (fmt != RAW || infilesize >= 0)) {
+	if(option_values.format_input_size >= 0) {
+	   	if (fmt != RAW || infilesize >= 0) {
 			flac__utils_printf(stderr, 1, "ERROR: can only use --input-size when encoding raw samples from stdin\n");
 			return 1;
 		}
 		else {
 			infilesize = option_values.format_input_size;
 		}
+	}
 
 	if(option_values.sector_align && fmt == RAW && infilesize < 0) {
 		flac__utils_printf(stderr, 1, "ERROR: can't --sector-align when the input size is unknown\n");