Use memmove instead of memcpy for overlapping areas

There may be more - this is just the result of a quick eye-grep
for memcpy(x, x+i).

diff --git a/imap-send.c b/imap-send.c
index 16804ab..88d635f 100644
--- a/imap-send.c
+++ b/imap-send.c
@@ -272,7 +272,7 @@ buffer_gets( buffer_t * b, char **s )
 				n = b->bytes - start;
 
 				if (n)
-					memcpy( b->buf, b->buf + start, n );
+					memmove( b->buf, b->buf + start, n );
 				b->offset -= start;
 				b->bytes = n;
 				start = 0;
diff --git a/index-pack.c b/index-pack.c
index e33f605..a275982 100644
--- a/index-pack.c
+++ b/index-pack.c
@@ -61,7 +61,7 @@ static void * fill(int min)
 		die("cannot fill %d bytes", min);
 	if (input_offset) {
 		SHA1_Update(&input_ctx, input_buffer, input_offset);
-		memcpy(input_buffer, input_buffer + input_offset, input_len);
+		memmove(input_buffer, input_buffer + input_offset, input_len);
 		input_offset = 0;
 	}
 	do {

Ciao, ET.
-
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