wined3d: Set the initial primitive type to WINED3D_PT_UNDEFINED.

dlls/wined3d/device.c

@@ -90,7 +90,8 @@ GLenum gl_primitive_type_from_d3d(enum wined3d_primitive_type primitive_type)
 
         default:
             FIXME("Unhandled primitive type %s\n", debug_d3dprimitivetype(primitive_type));
-            return GL_NONE;
+        case WINED3D_PT_UNDEFINED:
+            return ~0u;
     }
 }
 
@@ -130,6 +131,7 @@ static enum wined3d_primitive_type d3d_primitive_type_from_gl(GLenum primitive_t
 
         default:
             FIXME("Unhandled primitive type %s\n", debug_d3dprimitivetype(primitive_type));
+        case ~0u:
             return WINED3D_PT_UNDEFINED;
     }
 }

dlls/wined3d/stateblock.c

@@ -1121,6 +1121,8 @@ static void state_init_default(struct wined3d_state *state, const struct wined3d
 
     TRACE("state %p, gl_info %p.\n", state, gl_info);
 
+    state->gl_primitive_type = ~0u;
+
     /* Set some of the defaults for lights, transforms etc */
     state->transforms[WINED3D_TS_PROJECTION] = identity;
     state->transforms[WINED3D_TS_VIEW] = identity;