Update algorithms/graphs/min_cost_valid_path/__init__.py

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

Author: BrianLusina

algorithms/graphs/min_cost_valid_path/__init__.py

@@ -145,6 +145,8 @@ def is_valid(row: int, col: int) -> bool:
 
 
 def min_cost_0_1_bfs_2(grid: List[List[int]]) -> int:
+    if not grid:
+        return 0
     # Store the number of rows and columns of grid
     num_rows, num_cols = len(grid), len(grid[0])