Added the signature cvMinEnclosingTriangle (C version) to the imgproc_c.h header

modules/imgproc/include/opencv2/imgproc/imgproc_c.h

@@ -377,6 +377,10 @@ CVAPI(double)  cvContourArea( const CvArr* contour,
 CVAPI(CvBox2D)  cvMinAreaRect2( const CvArr* points,
                                 CvMemStorage* storage CV_DEFAULT(NULL));
 
+/* Finds minimum enclosing triangle for a set of points */
+CVAPI(int)  cvMinEnclosingTriangle( const CvArr* points,
+                                    CvArr* triangle, double* area );
+
 /* Finds minimum enclosing circle for a set of points */
 CVAPI(int)  cvMinEnclosingCircle( const CvArr* points,
                                   CvPoint2D32f* center, float* radius );