Turn on -Wall -Wextra on Mac, and fix all the warnings that crop up for /usr/bin/g++ and Clang 3.3.
BUG=
R=bungeman@google.com

Author: mtklein@google.com

Review URL: https://chromiumcodereview.appspot.com/19569012

git-svn-id: http://skia.googlecode.com/svn/trunk@10255 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/bench/PathIterBench.cpp b/bench/PathIterBench.cpp
index 8bc8add..987a752 100644
--- a/bench/PathIterBench.cpp
+++ b/bench/PathIterBench.cpp
@@ -72,7 +72,7 @@
                 SkPath::Verb verb;
                 SkPoint      pts[4];
 
-                while ((verb = iter.next(pts)) != SkPath::kDone_Verb);
+                while ((verb = iter.next(pts)) != SkPath::kDone_Verb) { }
             }
         } else {
             for (int i = 0; i < N; ++i) {
@@ -80,7 +80,7 @@
                 SkPath::Verb verb;
                 SkPoint      pts[4];
 
-                while ((verb = iter.next(pts)) != SkPath::kDone_Verb);
+                while ((verb = iter.next(pts)) != SkPath::kDone_Verb) { }
             }
         }
     }