https://github.com/OpenCPN/OpenCPN/issues/2163

diff --git a/OpenCPN/plugins/dashboard_pi/src/dashboard_pi.cpp b/OpenCPN/plugins/dashboard_pi/src/dashboard_pi.cpp
index e8504c2..8fd4b37 100644
--- a/OpenCPN/plugins/dashboard_pi/src/dashboard_pi.cpp
+++ b/OpenCPN/plugins/dashboard_pi/src/dashboard_pi.cpp
@@ -529,7 +529,7 @@ bool dashboard_pi::DeInit( void )
 }
 
 double GetJsonDouble(wxJSONValue &value) {
-    double d_ret;
+    double d_ret = 0;
     if (value.IsDouble()) {
         return d_ret = value.AsDouble();
     }
@@ -537,6 +537,7 @@ double GetJsonDouble(wxJSONValue &value) {
         int i_ret = value.AsInt();
         return d_ret = i_ret;
     }
+    return d_ret;
 }
 
 void dashboard_pi::Notify()