Fix build warning

modules/highgui/src/cap_v4l.cpp

@@ -1546,6 +1546,7 @@ yuv420p_to_rgb24(int width, int height,
 //
 /* Converts from interlaced YUV420 to RGB24. */
 /* [FD] untested... */
+#ifdef HAVE_CAMV4L
 static void
 yuv420_to_rgb24(int width, int height,
         unsigned char *pIn0, unsigned char *pOut0)
@@ -1590,6 +1591,7 @@ yuv420_to_rgb24(int width, int height,
         pOut += width * bytes;
     }
 }
+#endif //HAVE_CAMV4L
 
 // Consider a YUV411P image of 8x2 pixels.
 //
@@ -1641,6 +1643,8 @@ yuv411p_to_rgb24(int width, int height,
 /* based on ccvt_yuyv_bgr32() from camstream */
 #define SAT(c) \
         if (c & (~255)) { if (c < 0) c = 0; else c = 255; }
+
+#ifdef HAVE_CAMV4L2
 static void
 yuyv_to_rgb24 (int width, int height, unsigned char *src, unsigned char *dst)
 {
@@ -1732,6 +1736,7 @@ uyvy_to_rgb24 (int width, int height, unsigned char *src, unsigned char *dst)
       }
    }
 }
+#endif //HAVE_CAMV4L2
 
 #ifdef HAVE_JPEG
 
@@ -1758,6 +1763,7 @@ mjpeg_to_rgb24 (int width, int height,
  *
  */
 
+#ifdef HAVE_CAMV4L2
 static void bayer2rgb24(long int WIDTH, long int HEIGHT, unsigned char *src, unsigned char *dst)
 {
     long int i;
@@ -1919,7 +1925,6 @@ static void sgbrg2rgb24(long int WIDTH, long int HEIGHT, unsigned char *src, uns
     }
 }
 
-
 #define CLAMP(x)        ((x)<0?0:((x)>255)?255:(x))
 
 typedef struct {
@@ -2090,7 +2095,7 @@ static int sonix_decompress(int width, int height, unsigned char *inp, unsigned
 
   return 0;
 }
-
+#endif //HAVE_CAMV4L2
 
 static IplImage* icvRetrieveFrameCAM_V4L( CvCaptureCAM_V4L* capture, int) {
 
@@ -2191,7 +2196,6 @@ static IplImage* icvRetrieveFrameCAM_V4L( CvCaptureCAM_V4L* capture, int) {
                   (unsigned char*)(capture->buffers[capture->bufferIndex].start),
                   (unsigned char*)capture->frame.imageData);
         break;
-
     case PALETTE_UYVY:
         uyvy_to_rgb24(capture->form.fmt.pix.width,
                   capture->form.fmt.pix.height,
@@ -2233,7 +2237,8 @@ static IplImage* icvRetrieveFrameCAM_V4L( CvCaptureCAM_V4L* capture, int) {
 #ifdef HAVE_CAMV4L
   {
 
-    switch(capture->imageProperties.palette) {
+    switch(capture->imageProperties.palette)
+    {
     case VIDEO_PALETTE_RGB24:
         memcpy((char *)capture->frame.imageData,
            (char *)(capture->memoryMap + capture->memoryBuffer.offsets[capture->bufferIndex]),