Actually add the gdisplays_flush call that an this changelog entry refers to

Mon Aug 31 23:32:40 CDT 1998  Larry Ewing  <lewing@gimp.org>

	* app/gimpimage.c (gimp_image_remove_layer_mask): add back a call to
	gdisplays_flush that seems to have been lost in the
	objectification.

app/core/gimpimage-guides.c

@@ -2249,6 +2249,7 @@ gimp_image_remove_layer_mask (GimpImage *gimage, Layer *layer, int mode)
 		      drawable_height (GIMP_DRAWABLE(layer)));
     }
 
+  gdisplays_flush ();
   return NULL;
 }
 

app/core/gimpimage-merge.c

@@ -2249,6 +2249,7 @@ gimp_image_remove_layer_mask (GimpImage *gimage, Layer *layer, int mode)
 		      drawable_height (GIMP_DRAWABLE(layer)));
     }
 
+  gdisplays_flush ();
   return NULL;
 }
 

app/core/gimpimage-projection.c

@@ -2249,6 +2249,7 @@ gimp_image_remove_layer_mask (GimpImage *gimage, Layer *layer, int mode)
 		      drawable_height (GIMP_DRAWABLE(layer)));
     }
 
+  gdisplays_flush ();
   return NULL;
 }
 

app/core/gimpimage-resize.c

@@ -2249,6 +2249,7 @@ gimp_image_remove_layer_mask (GimpImage *gimage, Layer *layer, int mode)
 		      drawable_height (GIMP_DRAWABLE(layer)));
     }
 
+  gdisplays_flush ();
   return NULL;
 }
 

app/core/gimpimage-scale.c

@@ -2249,6 +2249,7 @@ gimp_image_remove_layer_mask (GimpImage *gimage, Layer *layer, int mode)
 		      drawable_height (GIMP_DRAWABLE(layer)));
     }
 
+  gdisplays_flush ();
   return NULL;
 }
 

app/core/gimpimage.c

@@ -2249,6 +2249,7 @@ gimp_image_remove_layer_mask (GimpImage *gimage, Layer *layer, int mode)
 		      drawable_height (GIMP_DRAWABLE(layer)));
     }
 
+  gdisplays_flush ();
   return NULL;
 }
 

app/core/gimpprojection-construct.c

@@ -2249,6 +2249,7 @@ gimp_image_remove_layer_mask (GimpImage *gimage, Layer *layer, int mode)
 		      drawable_height (GIMP_DRAWABLE(layer)));
     }
 
+  gdisplays_flush ();
   return NULL;
 }
 

app/gimpimage.c

@@ -2249,6 +2249,7 @@ gimp_image_remove_layer_mask (GimpImage *gimage, Layer *layer, int mode)
 		      drawable_height (GIMP_DRAWABLE(layer)));
     }
 
+  gdisplays_flush ();
   return NULL;
 }