fix/workaround for crash in ocean modifier when size is zero (causes invalid array index/lookups).

source/blender/modifiers/intern/MOD_ocean.c

@@ -426,6 +426,11 @@ static DerivedMesh *doOcean(ModifierData *md, Object *ob,
 
 	const float size_co_inv = 1.0f / (omd->size * omd->spatial_size);
 
+	/* can happen in when size is small, avoid bad array lookups later and quit now */
+	if (!isfinite(size_co_inv)) {
+		return derivedData;
+	}
+
 	/* update modifier */
 	if (omd->refresh & MOD_OCEAN_REFRESH_ADD)
 		omd->ocean = BKE_add_ocean();
@@ -531,7 +536,7 @@ static DerivedMesh *doOcean(ModifierData *md, Object *ob,
 		}
 	}
 
-	#undef OCEAN_CO
+#undef OCEAN_CO
 
 	return dm;
 }