patch 9.1.1073: tests: test_compiler fails on Windows without Maven

Problem:  tests: test_compiler fails on Windows without Maven.
Solution: Add Xspotbugs directory to $PATH when mvn is not available
          (zeertzjq).

closes: #16576

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/test_compiler.vim b/src/testdir/test_compiler.vim
index d62a4ee..99f4724 100644
--- a/src/testdir/test_compiler.vim
+++ b/src/testdir/test_compiler.vim
@@ -417,8 +417,10 @@
 
   " TEST INTEGRATION WITH A SUPPORTED COMPILER PLUGIN.
   if filereadable($VIMRUNTIME .. '/compiler/maven.vim')
+    let save_PATH = $PATH
     if !executable('mvn')
       if has('win32')
+        let $PATH = 'Xspotbugs;' .. $PATH
         " This is what ":help executable()" suggests.
         call writefile([], 'Xspotbugs/mvn.cmd')
       else
@@ -702,6 +704,7 @@
 
     bwipeout
     setlocal makeprg=
+    let $PATH = save_PATH
   endif
 
   filetype plugin off
diff --git a/src/version.c b/src/version.c
index dd500d1..add5959 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1073,
+/**/
     1072,
 /**/
     1071,