makefiles: Always use the global SOURCES variable for .po files.

po/Makefile.in

@@ -1,4 +1,4 @@
-PO_SRCS = \
+SOURCES = \
 	ar.po \
 	ast.po \
 	bg.po \

tools/make_makefiles

@@ -338,7 +338,7 @@ sub assign_sources_to_makefiles(@)
         my $make = $makefiles{"$dir/Makefile.in"};
         my $name = substr( $file, length($dir) + 1 );
 
-        if ($name =~ /\.mc$/)
+        if ($name =~ /\.(mc|po)$/)
         {
             push @{${$make}{"=SOURCES"}}, $name;
             next;
@@ -363,10 +363,6 @@ sub assign_sources_to_makefiles(@)
         {
             push @{${$make}{"=RC_SRCS"}}, $name;
         }
-        elsif ($name =~ /\.po$/)
-        {
-            push @{${$make}{"=PO_SRCS"}}, $name;
-        }
         elsif ($name =~ /\.idl$/)
         {
             die "no makedep flags specified in $file" unless $dir eq "include" || get_makedep_flags($file);