Fix testrigcaps.c

tests/testrigcaps.c

@@ -0,0 +1,37 @@
+#include <stdio.h>
+#include <hamlib/rig.h>
+
+int main()
+{
+    printf("Check rig_caps offsets\n");
+    printf("If changed can affect shared library API\n");
+    RIG *rig;
+    int retcode = 0;
+    rig_set_debug_level(RIG_DEBUG_NONE);
+    rig = rig_init(1);
+    void *p1 = &rig->state.rigport;
+    void *p2 = &rig->state.vfo_list;
+    unsigned long offset = p2 - p1;
+    printf("offset vfo_list=%ld\n", offset);
+    int expected = 13280;
+    if (offset != expected)
+    {
+        printf("offset of vfo_list has changed!!!\n");
+        printf("was %d, now %lu\n", expected, offset );
+        retcode = 1;
+    }
+
+    p2 = &rig->state.power_max;
+    offset = p2 - p1;
+    printf("offset power_max=%ld\n", offset);
+
+    expected = 13696;
+    if (offset != expected)
+    {
+        printf("offset of power_max has changed!!!\n");
+        printf("was %d, now %lu\n", expected, offset );
+        retcode = 1;
+    }
+
+    return retcode;
+}