@Copy() fixed to return 1 on 0 byte files. Patch by Ilia A <ilia@prohost.org>.

main/streams.c

@@ -474,6 +474,12 @@ PHPAPI size_t _php_stream_copy_to_stream(php_stream *src, php_stream *dest, size
 		if (fstat(srcfd, &sbuf) == 0) {
 			void *srcfile;
 
+			/* in the event that the source file is 0 bytes, return 1 to indicate success
+			 * because opening the file to write had already created a copy */
+
+			if(sbuf.st_size ==0)
+				return 1;
+
 			if (maxlen > sbuf.st_size || maxlen == 0)
 				maxlen = sbuf.st_size;