Fix SunOS build

Signed-off-by: Slendi <slendi@socopon.com>

patch.patch

@@ -0,0 +1,16 @@
+diff --git a/src/dcfg.c b/src/dcfg.c
+index e727e17..421f602 100644
+--- a/src/dcfg.c
++++ b/src/dcfg.c
+@@ -1615,7 +1615,11 @@ static bool ser_value(dcfg_Value *v, StrBld *sb)
+ 		return sb_put(sb, v->v.b ? "true" : "false", v->v.b ? 4 : 5);
+ 	case dcfg_ValueType_Integer: {
+ 		char tmp[64];
++#ifdef __sun
++		int n = snprintf(tmp, sizeof tmp, "%ld", v->v.i);
++#else
+ 		int n = snprintf(tmp, sizeof tmp, "%" PRId64, v->v.i);
++#endif
+ 		return sb_put(sb, tmp, (size_t)n);
+ 	}
+ 	case dcfg_ValueType_Real: {