Fix broken debug build

src/core/SkWriter32.cpp

Index: src/core/SkWriter32.cpp
diff --git a/src/core/SkWriter32.cpp b/src/core/SkWriter32.cpp
index 7285459c3d1e5767fff762d0bb38a4a6f848a2a0..1e8a10c87caceffa61045fbf1fe0524dfb92ff4e 100644
--- a/src/core/SkWriter32.cpp
+++ b/src/core/SkWriter32.cpp
@@ -81,6 +81,6 @@ void SkWriter32::growToAtLeast(size_t size) {
     // Expand the array so all reserved space is "used", we maintain the
     // amount we have written manually outside the array
     fInternal.setCount(fCapacity);
-    SkASSERT(fInternal.count() == fCapacity);
-    SkASSERT(fInternal.reserved() == fCapacity);
+    SkASSERT(fInternal.count() == (int)fCapacity);
+    SkASSERT(fInternal.reserved() == (int)fCapacity);
 }