main: validate arguments

src/main.cpp

@@ -33,7 +33,10 @@
 // Main code
 int main(int argc, char* argv[])
 {
-
+    if (argc == 1) {
+        printf("Usage: %s <module path>\n", argv[0]);
+        return -1;
+    }
 
     logging::init(true);//init logging
     const char* const path = argv[1]; //argument 1 is the path of self file to boot