patch 9.1.0595: make errors out with the po Makefile

Problem:  make errors out with the po Makefile
          (yanivshlom, after v9.1.0558)
Solution: Set variables differently (RestorerZ)

fixes: #15275
closes: #15282

Signed-off-by: RestorerZ <restorer@mail2k.ru>
Signed-off-by: Christian Brabandt <cb@256bit.org>

Author: RestorerZ

src/po/Makefile

@@ -314,7 +314,7 @@ $(LANGUAGES):
 #######
 
 # Preparing the POT file of the plug-in package
-POT_PLUGPACKAGE_PATH != pwd
+POT_PLUGPACKAGE_PATH = $(PWD)
 $(PLUGPACKAGE).pot: $(PO_PLUG_INPUTLIST)
 	$(VIMPROG) -u NONE --not-a-term -S tojavascript.vim \
 		$(PLUGPACKAGE).pot $?
@@ -327,7 +327,7 @@ $(PLUGPACKAGE).pot: $(PO_PLUG_INPUTLIST)
 	rm -f *.js ./vim_to_js
 
 # Converting the PO file of the plug-in package to the binary format of the MO
-MO_PLUGPACKAGE_PATH != pwd
+MO_PLUGPACKAGE_PATH = $(PWD)
 $(PLUGPACKAGE).mo: $(PO_PLUGPACKAGE)
 	$(MSGFMTCMD) -o $(MO_PLUGPACKAGE_PATH)/$@ $<
 

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    595,
 /**/
     594,
 /**/