winapi: init preprocessor_condition

[André Hentschel]

---
 tools/winapi/c_parser.pm |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/tools/winapi/c_parser.pm b/tools/winapi/c_parser.pm
index e927fb9..189f780 100644
--- a/tools/winapi/c_parser.pm
+++ b/tools/winapi/c_parser.pm
@@ -720,7 +720,7 @@ sub parse_c_file($$$$)
     my $previous_line = 0;
     my $previous_column = -1;
 
-    my $preprocessor_condition;
+    my $preprocessor_condition = "";
     my $if = 0;
     my $if0 = 0;
     my $extern_c = 0;
-- 

Best Regards, André Hentschel