Fix build in FreeBSD, and make sure SIGTERM is always the default.

SignalsPanel.c

@@ -14,6 +14,7 @@ in the source distribution for its full text.
 
 #include <stdlib.h>
 #include <assert.h>
+#include <signal.h>
 
 #include <ctype.h>
 
@@ -28,9 +29,16 @@ typedef struct SignalItem_ {
 
 Panel* SignalsPanel_new() {
    Panel* this = Panel_new(1, 1, 1, 1, true, Class(ListItem), FunctionBar_newEnterEsc("Send   ", "Cancel "));
-   for(unsigned int i = 0; i < Platform_numberOfSignals; i++)
+   const int defaultSignal = SIGTERM;
+   int defaultPosition = 15;
+   for(unsigned int i = 0; i < Platform_numberOfSignals; i++) {
       Panel_set(this, i, (Object*) ListItem_new(Platform_signals[i].name, Platform_signals[i].number));
+      // signal 15 is not always the 15th signal in the table
+      if (Platform_signals[i].number == defaultSignal) {
+         defaultPosition = i;
+      }
+   }
    Panel_setHeader(this, "Send signal:");
-   Panel_setSelected(this, 16); // 16th item is SIGTERM
+   Panel_setSelected(this, defaultPosition);
    return this;
 }

freebsd/Platform.c

@@ -37,7 +37,7 @@ ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_SIZE, M_R
 
 int Platform_numberOfFields = LAST_PROCESSFIELD;
 
-static SignalItem Platform_signals[] = {
+SignalItem Platform_signals[] = {
    { .name = " 0 Cancel",    .number =  0 },
    { .name = " 1 SIGHUP",    .number =  1 },
    { .name = " 2 SIGINT",    .number =  2 },