patch 8.2.5103: build fails with small features

Problem:    Build fails with small features.
Solution:   Add #ifdef.  Skip test on MS-Windows.

src/indent.c

@@ -1783,7 +1783,9 @@ ex_retab(exarg_T *eap)
 		emsg(_(e_resulting_text_too_long));
 		// when not inside a try/catch set got_int to break out of any
 		// loop
+#ifdef FEAT_EVAL
 		if (trylevel == 0)
+#endif
 		    got_int = TRUE;
 		break;
 	    }

src/testdir/test_retab.vim

@@ -105,6 +105,9 @@ func Test_retab_endless()
 endfunc
 
 func Test_nocatch_retab_endless()
+  " FIXME: why does this hang on MS-Windows?
+  CheckNotMSWindows
+
   " not inside try/catch an interrupt is generated to get out of loops
   new
   call setline(1, "\t0\t")

src/version.c

@@ -734,6 +734,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    5103,
 /**/
     5102,
 /**/