Don't create empty vectors using SubVector.

Fixes build-breakage.

TBR: whesse@chromium.org

Review URL: http://codereview.chromium.org/4168002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5710 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/strtod.cc

@@ -128,7 +128,7 @@ static Vector<const char> TrimLeadingZeros(Vector<const char> buffer) {
       return buffer.SubVector(i, buffer.length());
     }
   }
-  return buffer.SubVector(0, 0);
+  return Vector<const char>(buffer.start(), 0);
 }
 
 
@@ -138,7 +138,7 @@ static Vector<const char> TrimTrailingZeros(Vector<const char> buffer) {
       return buffer.SubVector(0, i + 1);
     }
   }
-  return buffer.SubVector(0, 0);
+  return Vector<const char>(buffer.start(), 0);
 }