Fix quotation for make install

Author: cacsar

Makefile.in

@@ -47,14 +47,14 @@ support:
 	@cd archive; $(MAKE) all CC="$(CC)" CFLAGS="$(CFLAGS)" CPPFLAGS="$(CPPFLAGS)" 
 
 install: 
-	@cd src; $(MAKE) install CC="$(CC)" CFLAGS="$(CFLAGS) \
-		"CPPFLAGS="$(CPPFLAGS)"  \
+	@cd src; $(MAKE) install CC="$(CC)" CFLAGS="$(CFLAGS)" \
+		CPPFLAGS="$(CPPFLAGS)"  \
 		cgidir="$(cgidir)" bindir="$(bindir)" LIBS="$(LIBS)"
 	@cd docs; $(MAKE) install CC="$(CC)" CFLAGS="$(CFLAGS)" \
-		"CPPFLAGS="$(CPPFLAGS)"  \
+		CPPFLAGS="$(CPPFLAGS)"  \
 		$(MAKEFLAGS) mandir="$(mandir)" htmldir="$(htmldir)"
 	@cd archive; $(MAKE) install CC="$(CC)" CFLAGS="$(CFLAGS)" \
-		"CPPFLAGS="$(CPPFLAGS)"  \
+		CPPFLAGS="$(CPPFLAGS)"  \
 		bindir="$(bindir)"
 
 uninstall: