[truetype] Clean up `exec` initialization.

* src/truetype/ttinterp.c (Init_Context): Absorbed into...
(TT_New_Context): ... this function.

src/truetype/ttinterp.c

@@ -275,64 +275,6 @@
   }
 
 
-  /**************************************************************************
-   *
-   * @Function:
-   *   Init_Context
-   *
-   * @Description:
-   *   Initializes a context object.
-   *
-   * @Input:
-   *   memory ::
-   *     A handle to the parent memory object.
-   *
-   * @InOut:
-   *   exec ::
-   *     A handle to the target execution context.
-   *
-   * @Return:
-   *   FreeType error code.  0 means success.
-   */
-  static FT_Error
-  Init_Context( TT_ExecContext  exec,
-                FT_Memory       memory )
-  {
-    FT_Error  error;
-
-
-    FT_TRACE1(( "Init_Context: new object at %p\n", (void *)exec ));
-
-    exec->memory   = memory;
-    exec->callSize = 32;
-
-    if ( FT_QNEW_ARRAY( exec->callStack, exec->callSize ) )
-      goto Fail_Memory;
-
-    /* all values in the context are set to 0 already, but this is */
-    /* here as a remainder                                         */
-    exec->maxPoints   = 0;
-    exec->maxContours = 0;
-
-    exec->stackSize = 0;
-    exec->glyphSize = 0;
-
-    exec->stack    = NULL;
-    exec->glyphIns = NULL;
-
-    exec->face = NULL;
-    exec->size = NULL;
-
-    return FT_Err_Ok;
-
-  Fail_Memory:
-    FT_ERROR(( "Init_Context: not enough memory for %p\n", (void *)exec ));
-    TT_Done_Context( exec );
-
-    return error;
- }
-
-
   /**************************************************************************
    *
    * @Function:
@@ -617,19 +559,19 @@
 
     memory = driver->root.root.memory;
 
-    /* allocate object */
+    /* allocate object and zero everything inside */
     if ( FT_NEW( exec ) )
       goto Fail;
 
-    /* initialize it; in case of error this deallocates `exec' too */
-    error = Init_Context( exec, memory );
-    if ( error )
-      goto Fail;
+    /* create callStack here, other allocations delayed */
+    exec->memory   = memory;
+    exec->callSize = 32;
 
-    return exec;
+    if ( FT_QNEW_ARRAY( exec->callStack, exec->callSize ) )
+      FT_FREE( exec );
 
   Fail:
-    return NULL;
+    return exec;
   }