Some warning fix. Initial multicast get property support

modules/highgui/src/cap_pvapi.cpp

@@ -191,7 +191,7 @@ bool CvCaptureCAM_PvAPI::open( int index )
         //PvAttrUint32Get(Camera.Handle,"PacketSize",&maxSize);
         if (PvCaptureAdjustPacketSize(Camera.Handle,maxSize)!=ePvErrSuccess)
 			return false;
-        if (strncmp(pixelFormat, "Mono8",NULL)==0) {
+        if (strcmp(pixelFormat, "Mono8")==0) {
 				grayframe = cvCreateImage(cvSize((int)frameWidth, (int)frameHeight), IPL_DEPTH_8U, 1);
 				grayframe->widthStep = (int)frameWidth;
 				frame = cvCreateImage(cvSize((int)frameWidth, (int)frameHeight), IPL_DEPTH_8U, 3);
@@ -199,7 +199,7 @@ bool CvCaptureCAM_PvAPI::open( int index )
 				Camera.Frame.ImageBufferSize = frameSize;
 				Camera.Frame.ImageBuffer = grayframe->imageData;   
 		}	    
-		else if (strncmp(pixelFormat, "Mono16",NULL)==0) {
+		else if (strcmp(pixelFormat, "Mono16")==0) {
 				grayframe = cvCreateImage(cvSize((int)frameWidth, (int)frameHeight), IPL_DEPTH_16U, 1);
 				grayframe->widthStep = (int)frameWidth;	
 				frame = cvCreateImage(cvSize((int)frameWidth, (int)frameHeight), IPL_DEPTH_16U, 3);
@@ -207,7 +207,7 @@ bool CvCaptureCAM_PvAPI::open( int index )
 				Camera.Frame.ImageBufferSize = frameSize;
 				Camera.Frame.ImageBuffer = grayframe->imageData;
 		}	  
-		else if	(strncmp(pixelFormat, "Bgr24",NULL)==0) {
+		else if	(strcmp(pixelFormat, "Bgr24")==0) {
 				frame = cvCreateImage(cvSize((int)frameWidth, (int)frameHeight), IPL_DEPTH_8U, 3);
 				frame->widthStep = (int)frameWidth*3;
 				Camera.Frame.ImageBufferSize = frameSize;
@@ -283,6 +283,20 @@ double CvCaptureCAM_PvAPI::getProperty( int property_id )
 	tPvFloat32 nfTemp;
         PvAttrFloat32Get(Camera.Handle, "StatFrameRate", &nfTemp);
         return (double)nfTemp;
+    case CV_CAP_PROP_PVAPI_MULTICASTIP:
+	char mEnable[2];
+	char mIp[11];
+	PvAttrEnumGet(Camera.Handle,"MulticastEnable",mEnable,sizeof(mEnable),NULL);
+	if (strcmp(mEnable, "Off") == 0) {
+	    return -1;
+	}
+	else {
+	    long int ip;
+	    int a,b,c,d;
+	    PvAttrStringGet(Camera.Handle, "MulticastIPAddress",mIp,sizeof(mIp),NULL);
+	    sscanf(mIp, "%d.%d.%d.%d", &a, &b, &c, &d); ip = ((a*256 + b)*256 + c)*256 + d;
+	    return (double)ip;
+	}
     }
     return -1.0;
 }
@@ -303,7 +317,7 @@ bool CvCaptureCAM_PvAPI::setProperty( int property_id, double value )
         if (value==1) {
 			char pixelFormat[256];
 			PvAttrEnumGet(Camera.Handle, "PixelFormat", pixelFormat,256,NULL);
-			if ((strncmp(pixelFormat, "Mono8",NULL)==0) || strncmp(pixelFormat, "Mono16",NULL)==0) {
+			if ((strcmp(pixelFormat, "Mono8")==0) || strcmp(pixelFormat, "Mono16")==0) {
 				monocrome=true;
 			}	
 			else