fs: Fix renaming files/folders destination path (fixes #116)

Author: joel16

source/fs.cpp

@@ -138,8 +138,9 @@ namespace FS {
 
     bool Rename(FsDirectoryEntry &entry, const std::string &dest_path) {
         std::string src_path = FS::BuildPath(entry);
+        std::string full_dest_path = FS::BuildPath(dest_path, true);
 
-        if (rename(src_path.c_str(), dest_path.c_str()) != 0) {
+        if (rename(src_path.c_str(), full_dest_path.c_str()) != 0) {
             Log::Error("FS::Rename(%s, %s) failed.\n", src_path.c_str(), dest_path.c_str());
             return false;
         }

source/popups/options.cpp

@@ -84,7 +84,8 @@ namespace Popups {
 
             if (ImGui::Button(strings[cfg.lang][Lang::OptionsRename], ImVec2(200, 50))) {
                 std::string path = Keyboard::GetText(strings[cfg.lang][Lang::OptionsRenamePrompt], data.entries[data.selected].name);
-                if (R_SUCCEEDED(FS::Rename(data.entries[data.selected], path.c_str()))) {
+                
+                if (FS::Rename(data.entries[data.selected], path.c_str())) {
                     Options::RefreshEntries(false);
                     sort = -1;
                 }