fix vpx for regular non-gl rendering case

git-svn-id: https://xpra.org/svn/Xpra/trunk@926 3bb7dfac-3a0b-4e04-842a-767bc560f471

src/xpra/vpx/codec.pyx

@@ -64,7 +64,7 @@ cdef class Decoder(xcoder):
             clean_decoder(self.context)
             self.context = NULL
 
-    def decompress_image(self, input):
+    def decompress_image_to_rgb(self, input):
         cdef uint8_t *dout
         cdef int outsize
         cdef int outstride