fix bogus in https://trac.osgeo.org/grass/changeset/63416

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@63417 15284696-431f-4ddb-bdfa-cd5b030d7da7

include/Make/Script.make

@@ -34,8 +34,10 @@ scriptstrings: $(STRINGDIR)/$(PGM)_to_translate.c
 install:
 	$(INSTALL) $(SCRIPT) $(INST_DIR)/scripts/
 	$(INSTALL_DATA) $(HTMLDIR)/$(PGM).html $(INST_DIR)/docs/html/
-	$(INSTALL_DATA) $(HTMLDIR)/*.png $(INST_DIR)/docs/html/
-	$(INSTALL_DATA) $(HTMLDIR)/*.jpg $(INST_DIR)/docs/html/
+	$(eval IMG := $(wildcard $(HTMLDIR)/*.png) $(wildcard $(HTMLDIR)/*.jpg))
+	if [ -n "$(IMG)" ] ; then \
+		$(INSTALL_DATA) $(IMG)  $(INST_DIR)/docs/html/ ; \
+	fi
 	$(INSTALL_DATA) $(ARCH_DISTDIR)/docs/man/man1/$(PGM).1 $(INST_DIR)/docs/man/man1/
 	if [ -d "$(ETC)/$(PGM)" ] ; then \
 		cp -rL $(ETC)/$(PGM) $(INST_DIR)/etc/ ; \