Merge pull request #2081 from bbbradsmith/suppress-size-error

ca65: Suppress '.size' error for multiply-defined symbols

src/ca65/main.c

@@ -858,8 +858,13 @@ static void OneLine (void)
             /* The line has switched the segment */
             Size = 0;
         }
+        /* Suppress .size Symbol if this Symbol already has a multiply-defined error,
+        ** as it will only create its own additional unnecessary error.
+        */
+        if ((Sym->Flags & SF_MULTDEF) == 0) {
             DefSizeOfSymbol (Sym, Size);
         }
+    }
 
     /* Line separator must come here */
     ConsumeSep ();