fix warning from scalar --> int32 conversion

BUG=

Review URL: https://codereview.appspot.com/7065050

git-svn-id: http://skia.googlecode.com/svn/trunk@7061 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SampleAAClip.cpp b/samplecode/SampleAAClip.cpp
index 196641e..617d786 100644
--- a/samplecode/SampleAAClip.cpp
+++ b/samplecode/SampleAAClip.cpp
@@ -18,7 +18,7 @@
     c1.setRect(r1);
     c2.op(c0, c1, op);
 
-    SkIRect r2 = c2.getBounds();
+    SkDEBUGCODE(SkIRect r2 = c2.getBounds());
     SkASSERT(r2 == expectedR);
 }
 
diff --git a/samplecode/SampleColorFilter.cpp b/samplecode/SampleColorFilter.cpp
index e57ccb0..393f9b8 100644
--- a/samplecode/SampleColorFilter.cpp
+++ b/samplecode/SampleColorFilter.cpp
@@ -23,6 +23,7 @@
 
 #define SK_R16_BITS 5
 
+#ifdef SK_DEBUG
 static int round5_slow(int x) {
     int orig = x & 7;
     int fake = x >> 5;
@@ -38,15 +39,17 @@
     }
     return trunc + bias;
 }
+#endif
 
 static int round5_fast(int x) {
     int result = x + 3 - (x >> 5) + (x >> 7);
     result >>= 3;
-
+#ifdef SK_DEBUG
     {
         int r2 = round5_slow(x);
         SkASSERT(r2 == result);
     }
+#endif
     return result;
 }
 
diff --git a/samplecode/SampleRegion.cpp b/samplecode/SampleRegion.cpp
index 8b3a03c..b493ee4 100644
--- a/samplecode/SampleRegion.cpp
+++ b/samplecode/SampleRegion.cpp
@@ -274,13 +274,13 @@
 
             {
                 char    buffer[1000];
-                size_t  size = tmp.writeToMemory(NULL);
+                SkDEBUGCODE(size_t  size = ) tmp.writeToMemory(NULL);
                 SkASSERT(size <= sizeof(buffer));
-                size_t  size2 = tmp.writeToMemory(buffer);
+                SkDEBUGCODE(size_t  size2 = ) tmp.writeToMemory(buffer);
                 SkASSERT(size == size2);
 
                 SkRegion    tmp3;
-                size2 = tmp3.readFromMemory(buffer);
+                SkDEBUGCODE(size2 = ) tmp3.readFromMemory(buffer);
                 SkASSERT(size == size2);
 
                 SkASSERT(tmp3 == tmp);