Fix the "No valid file provided." sentence that was not being printed.

src/main.cpp

@@ -21,6 +21,7 @@ int main(int argc, char* argv[]) {
             }
             else if (currentArg.ends_with(".ybcon")) files.push_back(currentArg);
         }
+        if (!files.empty()) {
             const set<string_view> uniqueFiles(files.begin(), files.end());
             for (string_view fileName: uniqueFiles) {
                 if (fileName != "none") {
@@ -32,6 +33,10 @@ int main(int argc, char* argv[]) {
                     outputFileContent(outputFile, transpiledString);
                 }
             }
-    } else cout << "No valid file provided.\n";
+        } else {
+            cout << "No valid file provided.\n"; goto exitPoint;
+        }
+    }
+    exitPoint:
     return EXIT_SUCCESS;
 }