added patchfiles directory check

src/patch/main.rs

@@ -378,6 +378,17 @@ impl Iterator for SendFileIterator {
 fn main() {
     println!("[patch] starting server");
 
+    match std::fs::read_dir("patchfiles/") {
+        Ok(_) => {},
+        Err(_) => {
+            match std::fs::create_dir("patchfiles/") {
+                Ok(_) => {},
+                Err(_) => {
+                    panic!("Could not create patchfiles directory!");
+                },
+            }
+        },
+    }
     let (patch_file_tree, patch_file_lookup) = generate_patch_tree("patchfiles/");
     println!("[patch] files to patch:");
     let mut indent = 0;