cfg: Add CAIRO_VERSION_ENCODE()

Add CAIRO_VERSION_ENCODE() to fix undefined function-like macro error.

Author: b4n

cfg/cairo.cfg

@@ -21,6 +21,7 @@
   <define name="CAIRO_MIME_TYPE_PNG" value="&quot;image/png&quot;"/>
   <define name="CAIRO_MIME_TYPE_URI" value="&quot;text/x-uri&quot;"/>
   <define name="CAIRO_MIME_TYPE_UNIQUE_ID" value="&quot;application/x-cairo.uuid&quot;"/>
+  <define name="CAIRO_VERSION_ENCODE(major, minor, micro)" value="(((major) * 10000) + ((minor) * 100) + ((micro) * 1))"/>
   <!-- ########## cairo Allocation / Deallocation ########## -->
   <!-- ########## cairo Functions ########## -->
   <!-- cairo_t * cairo_create (cairo_surface_t *target); -->

test/cfg/cairo.c

@@ -9,6 +9,9 @@
 
 #include <cairo.h>
 
+#if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 2, 3)
+#endif
+
 void validCode(cairo_surface_t *target)
 {
     cairo_t * cairo1 = cairo_create(target);