fix project title bug

Author: Allen Webster

custom/4coder_project_commands.cpp

@@ -930,7 +930,7 @@ CUSTOM_DOC("Looks for a project.4coder file in the current directory and tries t
 
     // NOTE(allen): Set Window Title
     Variable_Handle proj_name_var = vars_read_key(prj_var, vars_save_string_lit("project_name"));
-    String_ID proj_name_id = vars_key_id_from_var(prj_var);
+    String_ID proj_name_id = vars_key_id_from_var(proj_name_var);
     if (proj_name_id != 0){
         String8 proj_name = vars_read_string(scratch, proj_name_id);
         String8 title = push_u8_stringf(scratch, "4coder project: %.*s", string_expand(proj_name));