[gimp] Fix warnings from windows build related .rule files

[Mukund Sivaraman <muks src gnome org>]

commit 333dfc7f134df1e092aa441084035934a24d100c
Author: Mukund Sivaraman <muks banu com>
Date:   Mon Oct 4 20:16:22 2010 +0530

    Fix warnings from windows build related .rule files

 build/windows/gimprc-plug-ins.rule |    5 ++++-
 build/windows/gimprc.rule          |    5 ++++-
 2 files changed, 8 insertions(+), 2 deletions(-)
---
diff --git a/build/windows/gimprc-plug-ins.rule b/build/windows/gimprc-plug-ins.rule
index 755b900..268cdc0 100644
--- a/build/windows/gimprc-plug-ins.rule
+++ b/build/windows/gimprc-plug-ins.rule
@@ -1,5 +1,8 @@
 # Version resources for Microsoft Windows
-%.rc.o: $(top_srcdir)/build/windows/gimp-plug-ins.rc
+
+SUFFIXES = .rc .rc.o
+
+.rc.rc.o: $(top_srcdir)/build/windows/gimp-plug-ins.rc
 	$(WINDRES) --define ORIGINALFILENAME_STR="$*$(EXEEXT)" \
 		--define INTERNALNAME_STR="$*" \
 		--define TOP_SRCDIR="$(top_srcdir)" \
diff --git a/build/windows/gimprc.rule b/build/windows/gimprc.rule
index 4df1304..363cc65 100644
--- a/build/windows/gimprc.rule
+++ b/build/windows/gimprc.rule
@@ -1,5 +1,8 @@
 # Version resources for Microsoft Windows
-%.rc.o: $(top_srcdir)/build/windows/gimp.rc
+
+SUFFIXES = .rc .rc.o
+
+.rc.rc.o: $(top_srcdir)/build/windows/gimp.rc
 	$(WINDRES) --define ORIGINALFILENAME_STR="$*$(EXEEXT)" \
 		--define INTERNALNAME_STR="$*" \
 		--define TOP_SRCDIR="$(top_srcdir)" \