[cff] minor code cleanup

src/cff/cf2font.h

@@ -46,7 +46,6 @@
 
 FT_BEGIN_HEADER
 
-#define CF2_CFF2_STACK_SIZE     193
 #define CF2_OPERAND_STACK_SIZE  48
 #define CF2_MAX_SUBR            16 /* maximum subroutine nesting;         */
                                    /* only 10 are allowed but there exist */

src/cff/cf2intrp.c

@@ -474,7 +474,7 @@
     CF2_Fixed  hintOriginY = curY;
 
     CF2_Stack  opStack = NULL;
-    FT_UInt    stackSize = font->isCFF2 ? CF2_CFF2_STACK_SIZE : CF2_OPERAND_STACK_SIZE;
+    FT_UInt    stackSize;
     FT_Byte    op1;                       /* first opcode byte */
 
     CF2_F16Dot16  storage[CF2_STORAGE_SIZE];    /* for `put' and `get' */

src/cff/cffload.c

@@ -1260,7 +1260,7 @@
 
     /* compute expected number of operands for this blend */
     FT_UInt numOperands = (FT_UInt)(numBlends * blend->lenBV);
-    FT_UInt count = parser->top - 1 - parser->stack;
+    FT_UInt count = (FT_UInt)( parser->top - 1 - parser->stack );
 
     if ( numOperands > count )
     {
@@ -1859,7 +1859,7 @@ Exit:
     top->cid_font_name       = 0xFFFFU;
 
     /* set default stack size */
-    top->maxstack            = cff2 ? 193 : 48;
+    top->maxstack            = cff2 ? CFF2_DEFAULT_STACK : 48;
 
     if ( idx->count )   /* count is nonzero for a real index */
       error = cff_index_access_element( idx, font_index, &dict, &dict_len );