Factored out error handling in a dedicated function

This makes it possible to reuse the error handling of the base axis in
derived axis types (e.g. seleneGuide driver).

Makefile

@@ -14,7 +14,7 @@ REQUIRED+=sinqMotor
 motorBase_VERSION=7.2.2
 
 # Specify the version of sinqMotor we want to build against
-sinqMotor_VERSION=mathis_s
+sinqMotor_VERSION=0.11.0
 
 # These headers allow to depend on this library for derived drivers.
 HEADERS += src/turboPmacAxis.h

src/turboPmacAxis.cpp

@@ -1284,7 +1284,10 @@ asynStatus turboPmacAxis::enable(bool on) {
     asynStatus pl_status = asynSuccess;
 
     bool moving = false;
-    doPoll(&moving);
+    rw_status = doPoll(&moving);
+    if (rw_status != asynSuccess) {
+        return rw_status;
+    }
 
     // =========================================================================