Changed multi-line C comments into another style.

The left side doesn't look unbalanced.

src/ar65/objdata.h

@@ -97,8 +97,8 @@ void ClearObjData (ObjData* O);
 
 ObjData* FindObjData (const char* Module);
 /* Search for the module with the given name and return it. Return NULL if the
- * module is not in the list.
- */
+** module is not in the list.
+*/
 
 void DelObjData (const char* Module);
 /* Delete the object module from the list */