patch 8.2.2059: Amiga: can't find plugins

Problem:    Amiga: can't find plugins.
Solution:   Do not use "**" in the pattern. (Ola Söder, closes #7384)
diff --git a/src/main.c b/src/main.c
index 53b8719..e3ce9e4 100644
--- a/src/main.c
+++ b/src/main.c
@@ -432,6 +432,13 @@
     if (p_lpl)
     {
 	char_u *rtp_copy = NULL;
+	char_u *plugin_pattern = (char_u *)
+# if defined(VMS) || defined(AMIGA) // VMS and Amiga don't handle the "**".
+		"plugin/*.vim"
+# else
+		"plugin/**/*.vim"
+# endif
+		;
 
 	// First add all package directories to 'runtimepath', so that their
 	// autoload directories can be found.  Only if not done already with a
@@ -444,12 +451,7 @@
 	    add_pack_start_dirs();
 	}
 
-	source_in_path(rtp_copy == NULL ? p_rtp : rtp_copy,
-# ifdef VMS	// Somehow VMS doesn't handle the "**".
-		(char_u *)"plugin/*.vim",
-# else
-		(char_u *)"plugin/**/*.vim",
-# endif
+	source_in_path(rtp_copy == NULL ? p_rtp : rtp_copy, plugin_pattern,
 		DIP_ALL | DIP_NOAFTER, NULL);
 	TIME_MSG("loading plugins");
 	vim_free(rtp_copy);
@@ -460,13 +462,8 @@
 	    load_start_packages();
 	TIME_MSG("loading packages");
 
-# ifdef VMS	// Somehow VMS doesn't handle the "**".
-	source_runtime((char_u *)"plugin/*.vim", DIP_ALL | DIP_AFTER);
-# else
-	source_runtime((char_u *)"plugin/**/*.vim", DIP_ALL | DIP_AFTER);
-# endif
+	source_runtime(plugin_pattern, DIP_ALL | DIP_AFTER);
 	TIME_MSG("loading after plugins");
-
     }
 #endif