Protect check of CV_SSE4_2 with #if defined.

modules/core/src/stat.cpp

@@ -225,7 +225,7 @@ template <>
 int countNonZero_ <uchar> (const uchar* src, int len)
 {
 	int i=0, nz = 0;
-	#if CV_SSE4_2
+	#if (defined CV_SSE4_2 && CV_SSE4_2)
 	if(USE_SSE4_2)//5x-6x
 	{
 		__m128i pattern = _mm_setzero_si128 ();
@@ -2012,4 +2012,4 @@ cvNorm( const void* imgA, const void* imgB, int normType, const void* maskarr )
         cv::extractImageCOI(imgB, b);
 
     return !maskarr ? cv::norm(a, b, normType) : cv::norm(a, b, normType, mask);
-}
\ No newline at end of file
+}