cabinet: Remove unneeded casts.

dlls/cabinet/cabinet.h

@@ -403,11 +403,11 @@ typedef struct {
 #define FDI_INT_MAGIC 0xfdfdfd05
 
 #define REALLY_IS_FCI(hfci) ( \
-  (((void *) hfci) != NULL) && \
+  ((hfci) != NULL) && \
   (PFCI_INT(hfci)->FCI_Intmagic == FCI_INT_MAGIC) )
 
 #define REALLY_IS_FDI(hfdi) ( \
-  (((void *) hfdi) != NULL) && \
+  ((hfdi) != NULL) && \
   (PFDI_INT(hfdi)->FDI_Intmagic == FDI_INT_MAGIC) )
 
 /*