added windows implementation of sys_removedir and used snprintf in the unix one

src/backends/unix/system.c

@@ -504,7 +504,7 @@ Sys_RemoveDir(const char *path)
 	{
 		while ((file = readdir(directory)) != NULL)
 		{
-			sprintf(filepath, "%s/%s", path, file->d_name);
+			snprintf(filepath, MAX_OSPATH, "%s/%s", path, file->d_name);
 			Sys_Remove(filepath);
 		}
 

src/backends/windows/system.c

@@ -556,6 +556,37 @@ Sys_Rename(const char *from, const char *to)
 	return _wrename(wfrom, wto);
 }
 
+void
+Sys_RemoveDir(const char *path)
+{
+	WCHAR wpath[MAX_OSPATH] = {0};
+	WCHAR wpathwithwildcard[MAX_OSPATH] = {0};
+	WCHAR wpathwithfilename[MAX_OSPATH] = {0};
+	WIN32_FIND_DATAW fd;
+	
+	MultiByteToWideChar(CP_UTF8, 0, path, -1, wpath, MAX_OSPATH);
+
+	wcscat_s(wpathwithwildcard, MAX_OSPATH, wpath);
+	wcscat_s(wpathwithwildcard, MAX_OSPATH, L"\\*.*");
+	
+	HANDLE hFind = FindFirstFileW(wpathwithwildcard, &fd);
+	if (hFind != INVALID_HANDLE_VALUE)
+	{
+		do
+		{
+			wmemset(wpathwithfilename, 0, MAX_OSPATH);
+			wcscat_s(wpathwithfilename, MAX_OSPATH, wpath);
+			wcscat_s(wpathwithfilename, MAX_OSPATH, fd.cFileName);
+			
+			DeleteFileW(wpathwithfilename);
+		}
+		while (FindNextFileW(hFind, &fd));
+		FindClose(hFind);
+	}
+	
+	RemoveDirectoryW(wpath);
+}
+
 /* ======================================================================= */
 
 void *