Fix two MSVC warnings. no_r=me.

js/src/jsvector.h

@@ -42,6 +42,12 @@
 
 #include "jstl.h"
 
+/* Silence dire "bugs in previous versions of MSVC have been fixed" warnings */
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable:4345)
+#endif
+
 namespace js {
 
 /*
@@ -786,4 +792,8 @@ Vector<T,N,AP>::replaceRawBuffer(T *p, size_t length)
 
 }  /* namespace js */
 
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
 #endif /* jsvector_h_ */

js/src/perf/jsperf.cpp

@@ -84,7 +84,7 @@ pm_finalize(JSContext* cx, JSObject* obj)
         PerfMeasurement* p = GetPM(cx, obj, #name);                     \
         if (!p)                                                         \
             return JS_FALSE;                                            \
-        return JS_NewNumberValue(cx, p->name, vp);                      \
+        return JS_NewNumberValue(cx, jsdouble(p->name), vp);            \
     }
 
 GETTER(cpu_cycles)