Fixed getNumThreads() for C=

modules/core/src/parallel.cpp

@@ -305,7 +305,9 @@ int cv::getNumThreads(void)
 
 #elif defined HAVE_CSTRIPES
 
-    return cv::getNumberOfCPUs();
+    return numThreads > 0
+            ? numThreads
+            : cv::getNumberOfCPUs();
 
 #elif defined HAVE_OPENMP
 
@@ -491,4 +493,4 @@ CV_IMPL int cvGetNumThreads()
 CV_IMPL int cvGetThreadNum()
 {
     return cv::getThreadNum();
-}
+}
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