gs1dotcode: Fix missing metadata requisite

Author: terryburton

src/gs1dotcode.ps.src

@@ -32,7 +32,7 @@
 % IN THE SOFTWARE.
 
 % --BEGIN ENCODER gs1dotcode--
-% --REQUIRES preamble raiseerror setuphooks processoptions parseinput gs1process setanycolor rendertext renmatrix dotcode--
+% --REQUIRES preamble raiseerror setuphooks processoptions parseinput gs1process setanycolor fifocache rendertext renmatrix dotcode--
 % --DESC: GS1 DotCode
 % --EXAM: (235)5vBZIF%!<B;?oa%(01)09521234543213(8008)19052001
 % --EXOP: rows=16