File implicit-function-declaration.patch of Package libbpg

--- a/bpgdec.c	2026-01-03 07:38:14.878658700 +0300
+++ b/bpgdec.c	2026-01-03 07:38:52.399103437 +0300
@@ -36,6 +36,7 @@
 #endif
 
 #include "libbpg.h"
+#include <string.h>
 
 static void ppm_save(BPGDecoderContext *img, const char *filename)
 {