More win64 warning fixes.

TBR=bsalomon@google.com
NOTREECHECKS=true

Review URL: https://codereview.chromium.org/887713002

1 files changed, 2 insertions, 2 deletions

diff --git a/tools/win_dbghelp.cpp b/tools/win_dbghelp.cpp
index ebdbaefcfa..57389b430d 100644
--- a/tools/win_dbghelp.cpp
+++ b/tools/win_dbghelp.cpp
@@ -209,14 +209,14 @@ void setUpDebuggingFromArgs(const char* vargs0) {
         i -= 4;
     }
 
-    int pos_period = i;
+    size_t pos_period = i;
 
     // Find last \ in path - this is Windows!
     while (i >= 0 && vargs0[i] != '\\') {
         i--;
     }
 
-    int pos_last_slash = i;
+    size_t pos_last_slash = i;
 
     char app_name[MAX_PATH];
     strncpy(app_name, vargs0 + pos_last_slash + 1, pos_period - pos_last_slash - 1);