added tests as prepared by oliver

test/ref/cc65090111.c

@@ -0,0 +1,49 @@
+/*
+  !!DESCRIPTION!! 
+  !!ORIGIN!!      testsuite
+  !!LICENCE!!     Public Domain
+  !!AUTHOR!!
+*/
+
+/*
+cc65 doesn't compile this, if i use the "-O"-option.
+but it works with "while(!0)"; instead of  "for(;;);"
+
+i'm using cl65 V2.12.9 win
+
+----
+#include <stdint.h>
+
+int main(void)
+{
+ static uint8_t x = 0;
+ static uint8_t y = 0;
+
+    for (x = 0; x < 16; ++x)
+    {
+     y = y + 1;
+    }
+    for(;;);
+}
+*/
+
+#include <stdint.h>
+
+int test(void)
+{
+ static uint8_t x = 0;
+ static uint8_t y = 0;
+
+    for (x = 0; x < 16; ++x)
+    {
+     y = y + 1;
+    }
+    for(;;);
+}
+
+int main(void)
+{
+    printf("it works :)\n");
+
+    return 0;
+}