[Sanitizer] fix windows build

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@161170 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/interception/interception_win.cc b/lib/interception/interception_win.cc
index 8e35a3b..abbab24 100644
--- a/lib/interception/interception_win.cc
+++ b/lib/interception/interception_win.cc
@@ -28,7 +28,7 @@
   };
   *func_addr = 0;
   for (size_t i = 0; *func_addr == 0 && DLLS[i]; ++i) {
-    *func_addr = GetProcAddress(GetModuleHandleA(DLLS[i]), func_name);
+    *func_addr = (uptr)GetProcAddress(GetModuleHandleA(DLLS[i]), func_name);
   }
   return (*func_addr != 0);
 }