Fix warnings added in 8d9a0e85bd6ab4fe5268a1d759a787f72ff9333e.

diff --git a/src/tools/msvc/Solution.pm b/src/tools/msvc/Solution.pm
index d53803e1860391534eed29395931e07d2c167ef9..89e4b07c801d499da10655eb35259d27be34db0f 100644 (file)
--- a/src/tools/msvc/Solution.pm
+++ b/src/tools/msvc/Solution.pm
@@ -162,11 +162,13 @@ sub GenerateFiles
          || confess "Could not open pg_config.h.win32\n";
        open(O, ">src\\include\\pg_config.h")
          || confess "Could not write to pg_config.h\n";
+       my $extraver = $self->{options}->{extraver};
+       $extraver = '' unless defined $extraver;
        while (<I>)
        {
-           s{PG_VERSION "[^"]+"}{PG_VERSION "$self->{strver}$self->{options}->{extraver}"};
+           s{PG_VERSION "[^"]+"}{PG_VERSION "$self->{strver}$extraver"};
            s{PG_VERSION_NUM \d+}{PG_VERSION_NUM $self->{numver}};
-           s{PG_VERSION_STR "[^"]+"}{__STRINGIFY(x) #x\n#define __STRINGIFY2(z) __STRINGIFY(z)\n#define PG_VERSION_STR "PostgreSQL $self->{strver}$self->{options}->{extraver}, compiled by Visual C++ build " __STRINGIFY2(_MSC_VER) ", $bits-bit"};
+           s{PG_VERSION_STR "[^"]+"}{__STRINGIFY(x) #x\n#define __STRINGIFY2(z) __STRINGIFY(z)\n#define PG_VERSION_STR "PostgreSQL $self->{strver}$extraver, compiled by Visual C++ build " __STRINGIFY2(_MSC_VER) ", $bits-bit"};
            print O;
        }
        print O "#define PG_MAJORVERSION \"$self->{majorver}\"\n";