[truetype] Reset the IUP-called flags for each subglyph.

This fixes fall-out from 7809007a5b, where the composite
accents were no longer hinted.

* src/truetype/ttgload.c (ttloader_init): Move the IUP-called flag
initialization from here...
* src/truetype/ttinterp.c (TT_Run_Context): ... to here.

src/truetype/ttgload.c

@@ -2689,8 +2689,6 @@
       if ( driver->interpreter_version == TT_INTERPRETER_VERSION_38 &&
            exec->GS.instruct_control & 4                            )
         exec->ignore_x_mode = FALSE;
-
-      exec->iup_called = FALSE;
 #endif /* TT_SUPPORT_SUBPIXEL_HINTING_INFINALITY */
 
 #ifdef TT_SUPPORT_SUBPIXEL_HINTING_MINIMAL
@@ -2713,9 +2711,6 @@
         exec->backward_compatibility = !( exec->GS.instruct_control & 4 );
       else
         exec->backward_compatibility = FALSE;
-
-      exec->iupx_called = FALSE;
-      exec->iupy_called = FALSE;
 #endif /* TT_SUPPORT_SUBPIXEL_HINTING_MINIMAL */
 
       exec->pedantic_hinting = FT_BOOL( load_flags & FT_LOAD_PEDANTIC );

src/truetype/ttinterp.c

@@ -516,6 +516,14 @@
     exec->GS.round_state = 1;
     exec->GS.loop        = 1;
 
+#ifdef TT_SUPPORT_SUBPIXEL_HINTING_INFINALITY
+    exec->iup_called  = FALSE;
+#endif
+#ifdef TT_SUPPORT_SUBPIXEL_HINTING_MINIMAL
+    exec->iupx_called = FALSE;
+    exec->iupy_called = FALSE;
+#endif
+
     /* some glyphs leave something on the stack. so we clean it */
     /* before a new execution.                                  */
     exec->top     = 0;