Minor changes to fix_hgt.cpp.

fix_hgt.cpp

@@ -26,8 +26,9 @@ int main(int argc, char* argv[])
 
   if(argc<2)
     {
-      cout<<"Wrong input to mdist.cpp: ./mdist <full path>"<<endl;
+      cout<<"Wrong input to fix_hgt.cpp: ./mdist <full path>"<<endl;
       cout<<"Optional options: -f <filtering steps> -o <filtering option>"<<endl;
+      exit(1);
     }
 
   full_path = argv[1];