Changed multi-line C comments into another style.

The left side doesn't look unbalanced.

src/ar65/exports.c

@@ -130,8 +130,8 @@ void ExpInsert (const char* Name, const ObjData* Module)
 
 const ObjData* ExpFind (const char* Name)
 /* Check for an identifier in the list. Return NULL if not found, otherwise
- * return a pointer to the module, that exports the identifer.
- */
+** return a pointer to the module, that exports the identifer.
+*/
 {
     /* Get a pointer to the list with the symbols hash value */
     HashEntry* L = HashTab [HashStr (Name) % HASHTAB_SIZE];