Changed multi-line C comments into another style.

The left side doesn't look unbalanced.

src/ld65/extsyms.c

@@ -124,8 +124,8 @@ ExtSym* NewExtSym (ExtSymTab* Tab, unsigned Name)
 
 static void FreeExtSym (ExtSym* E)
 /* Free an external symbol structure. Will not unlink the entry, so internal
- * use only.
- */
+** use only.
+*/
 {
     xfree (E);
 }
@@ -172,8 +172,8 @@ void FreeExtSymTab (ExtSymTab* Tab)
 
 ExtSym* GetExtSym (const ExtSymTab* Tab, unsigned Name)
 /* Return the entry for the external symbol with the given name. Return NULL
- * if there is no such symbol.
- */
+** if there is no such symbol.
+*/
 {
     /* Hash the name */
     unsigned Hash = (Name & HASHTAB_MASK);
@@ -204,8 +204,8 @@ unsigned ExtSymCount (const ExtSymTab* Tab)
 
 const ExtSym* ExtSymList (const ExtSymTab* Tab)
 /* Return the start of the symbol list sorted by symbol number. Call
- * ExtSymNext for the next symbol.
- */
+** ExtSymNext for the next symbol.
+*/
 {
     return Tab->Root;
 }