Fix T94387: Mesh sequence cache, crash when clicking a panel

The crash happens when opening a panel (added in rB43f5e761a66e87fed664a199cda867639f8daf3e)
when no CacheFile is set in the modifier.

To fix this, check that the CacheFile pointer is not null before attempting to draw anything.

1 files changed, 12 insertions, 0 deletions

diff --git a/source/blender/modifiers/intern/MOD_meshsequencecache.c b/source/blender/modifiers/intern/MOD_meshsequencecache.c
index 6982f95ef8d..00f39e58b4d 100644
--- a/source/blender/modifiers/intern/MOD_meshsequencecache.c
+++ b/source/blender/modifiers/intern/MOD_meshsequencecache.c
@@ -343,6 +343,10 @@ static void velocity_panel_draw(const bContext *UNUSED(C), Panel *panel)
     return;
   }
 
+  if (RNA_pointer_is_null(&fileptr)) {
+    return;
+  }
+
   uiLayoutSetPropSep(layout, true);
   uiTemplateCacheFileVelocity(layout, &fileptr);
   uiItemR(layout, ptr, "velocity_scale", 0, NULL, ICON_NONE);
@@ -360,6 +364,10 @@ static void time_panel_draw(const bContext *UNUSED(C), Panel *panel)
     return;
   }
 
+  if (RNA_pointer_is_null(&fileptr)) {
+    return;
+  }
+
   uiLayoutSetPropSep(layout, true);
   uiTemplateCacheFileTimeSettings(layout, &fileptr);
 }
@@ -376,6 +384,10 @@ static void render_procedural_panel_draw(const bContext *C, Panel *panel)
     return;
   }
 
+  if (RNA_pointer_is_null(&fileptr)) {
+    return;
+  }
+
   uiLayoutSetPropSep(layout, true);
   uiTemplateCacheFileProcedural(layout, C, &fileptr);
 }