[gimp] po: only warn on pot generation.

[Jehan Pagès <jehanp src gnome org>]

commit 20d45e5919d64f24b26603a070b7a21cbdd12cf5
Author: Jehan <jehan girinstud io>
Date:   Mon Oct 3 15:28:18 2016 +0200

    po: only warn on pot generation.
    
    Commit c4bb708 was making `make check` fail. I should not return `false`
    on the .pot file generation, simply warn. I explicitly fail the `make
    update-po` command though when $(INTLTOOL_UPDATE) is the `true` command
    because I know the message merge will fail and there won't be any proper
    error message explaining why when it does.

 po/Makefile.in.in |   10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)
---
diff --git a/po/Makefile.in.in b/po/Makefile.in.in
index 9add436..31defaa 100644
--- a/po/Makefile.in.in
+++ b/po/Makefile.in.in
@@ -98,9 +98,8 @@ all-no:
 
 $(GETTEXT_PACKAGE).pot: $(POTFILES)
        @if test "x$(INTLTOOL_UPDATE)" = "x/bin/true"; then \
-               echo "Error: po generation deactivated on VPATH builds."; \
-               echo "       See commit c96006919."; \
-               false; \
+               echo "Warning: pot generation deactivated on VPATH builds."; \
+               echo "         See commit c96006919."; \
        fi
        $(GENPOT)
 
@@ -185,6 +184,11 @@ dist distdir: $(DISTFILES)
        done
 
 update-po: Makefile
+       @if test "x$(INTLTOOL_UPDATE)" = "x/bin/true"; then \
+               echo "Error: po generation deactivated on VPATH builds."; \
+               echo "       See commit c96006919."; \
+               false; \
+       fi
        $(MAKE) $(GETTEXT_PACKAGE).pot
        tmpdir=`pwd`; \
        linguas="$(USE_LINGUAS)"; \