Do not add include bool if no col is bool

app/Tables/CStructArrayExporter.php

@@ -36,7 +36,8 @@ class CStructArrayExporter extends BaseExporter
      */
     protected function writeDocument()
     {
-        $fields = array_map(function (Column $c) {
+        $any_bool = false;
+        $fields = array_map(function (Column $c) use (&$any_bool) {
             $type = $c->type;
             if ($type == 'string') {
                 $type = 'const char *';
@@ -44,13 +45,17 @@ class CStructArrayExporter extends BaseExporter
 
             $name = $this->cify($c->name);
 
+            if ($c->type == 'bool') $any_bool = true;
+
             return (object)['name' => $c->name, 'type' => $c->type, 'ctype' => $type, 'cname' => $name];
         }, $this->columns);
 
         $ctablename = $this->cify($this->table->name);
 
         // preamble
-        echo "#include <stdbool.h>\n\n";
+        if ($any_bool) {
+            echo "#include <stdbool.h>\n\n";
+        }
 
         echo "struct " . $ctablename . " {\n";
         foreach ($fields as $field) {