added tests as prepared by oliver

test/ref/ifexpr.c

@@ -0,0 +1,36 @@
+/*
+  !!DESCRIPTION!! if/then, ? operator, compares
+  !!ORIGIN!!      cc65 devel list
+  !!LICENCE!!     Public Domain
+*/
+
+#include <stdio.h>
+#include <limits.h>
+
+void t1a(void)
+{
+    int a = -0x5000;
+
+    printf(a < 0x5000 ? "ok\n" : "error\n");
+}
+
+void t1b(void)
+{
+    int a = -0x5000;
+
+    if(a<0x5000)
+    {
+        printf("ok\n");
+    }
+    else
+    {
+        printf("error\n");
+    }
+}
+
+int main(void)
+{
+    t1a();t1b();
+
+    return 0;
+}