embryo_cc - fix coverity complaint about assert

fix assert using a strance assert syntax and go back to basic asserts.
fix coverity CID 1361224

@fix

src/bin/embryo/embryo_cc_sc1.c

@@ -2098,7 +2098,7 @@ funcstub(int native)
 	     error(10);		/* illegal function or declaration */
 	     return;
 	  }			/* if */
-        assert(("strcpy: source str size is more than available at destination", sizeof(str) <= sNAMEMAX));
+        assert(sizeof(str) <= sNAMEMAX);
 	strcpy(symbolname, str);
      }				/* if */
    needtoken('(');		/* only functions may be native/forward */