Upgrade sqlite to 3.7.12.
diff --git a/PCbuild/pyproject.props b/PCbuild/pyproject.props
index fb4efbb..fbeb5ae 100644
--- a/PCbuild/pyproject.props
+++ b/PCbuild/pyproject.props
@@ -4,7 +4,7 @@
     <PyDllName>python33</PyDllName>
     <PythonExe>$(SolutionDir)\python.exe</PythonExe>
     <externalsDir>..\..</externalsDir>
-    <sqlite3Dir>$(externalsDir)\sqlite-3.7.4</sqlite3Dir>
+    <sqlite3Dir>$(externalsDir)\sqlite-3.7.12</sqlite3Dir>
     <bz2Dir>$(externalsDir)\bzip2-1.0.6</bz2Dir>
     <lzmaDir>$(externalsDir)\xz-5.0.3</lzmaDir>
     <opensslDir>$(externalsDir)\openssl-1.0.0a</opensslDir>