examples: Use the src mode in scp do_copy function.

Found by clang-analyzer http://test.libssh.org/clang-analyzer/

examples/libssh_scp.c

@@ -182,7 +182,7 @@ static int do_copy(struct location *src, struct location *dest, int recursive){
     fd=fileno(src->file);
     fstat(fd,&s);
     size=s.st_size;
-    mode=s.st_mode;
+    mode = s.st_mode & S_IFMT;
     filename=ssh_basename(src->path);
   } else {
     size=0;
@@ -207,7 +207,7 @@ static int do_copy(struct location *src, struct location *dest, int recursive){
   }
 
   if(dest->is_ssh){
-	  r=ssh_scp_push_file(dest->scp,src->path,size,0644);
+	  r=ssh_scp_push_file(dest->scp,src->path, size, mode);
 	  //  snprintf(buffer,sizeof(buffer),"C0644 %d %s\n",size,src->path);
 	  if(r==SSH_ERROR){
 		  fprintf(stderr,"error: %s\n",ssh_get_error(dest->session));