Fix in JackPortAudioDevices::GetDeviceFromFullName.

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4758 0c269be4-1314-0410-8aa9-9f06e86f4224

windows/portaudio/JackPortAudioDevices.cpp

@@ -99,17 +99,19 @@ string PortAudioDevices::GetFullName(std::string hostname, std::string devicenam
 }
 
 PaDeviceInfo* PortAudioDevices::GetDeviceFromFullName (string fullname, PaDeviceIndex& id, bool isInput)
-{
+{
     PaDeviceInfo* ret = NULL;
     //no driver to find
-    if (fullname.size() == 0) {
+    if (fullname.size() == 0) {
         return NULL;
     }
     //first get host and device names from fullname
-    string::size_type separator = fullname.find ("::", 0);
-    if (separator == 0) {
+    string::size_type separator = fullname.find("::", 0);
+
+    if (separator == string::npos) {
         return NULL;
-    }
+    }
+
     char* hostname = (char*)malloc(separator + 9);
     fill_n (hostname, separator + 9, 0);
     fullname.copy (hostname, separator);