Update src/OptimizationProblems.jl

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: arnavk23

src/OptimizationProblems.jl

@@ -11,10 +11,11 @@ _adjust_nvar_warn_message(problem_name, n_orig, n) =
 Issue a warning if the number of variables was adjusted, showing both original and adjusted values.
 """
 macro adjust_nvar_warn(problem_name, n_orig, n)
+  helper = GlobalRef(@__MODULE__, :_adjust_nvar_warn_message)
   return quote
     local _n_orig = $(esc(n_orig))
     local _n = $(esc(n))
-    (_n == _n_orig) || @warn(_adjust_nvar_warn_message($(esc(problem_name)), _n_orig, _n))
+    (_n == _n_orig) || @warn($helper($(esc(problem_name)), _n_orig, _n))
   end
 end