From 0bad12d4015b55e222b3bb1bfef43dc2b551be77 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <icculus@icculus.org>
Date: Fri, 9 Mar 2018 14:50:37 -0500
Subject: [PATCH] ignorecase: Don't crash if enumeration returned a NULL
 pointer. (transplanted from f83d05e87212a5c7e377f3b205e6d70fc42772d4)

---
 extras/ignorecase.c | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/extras/ignorecase.c b/extras/ignorecase.c
index e6ea6e3b..5f0f35b8 100644
--- a/extras/ignorecase.c
+++ b/extras/ignorecase.c
@@ -50,18 +50,22 @@ static int locateOneElement(char *buf)
         ptr++;  /* point past dirsep to entry itself. */
     } /* else */
 
-    for (i = rc; *i != NULL; i++)
+    if (rc != NULL)
     {
-        if (PHYSFS_utf8stricmp(*i, ptr) == 0)
+        for (i = rc; *i != NULL; i++)
         {
-            strcpy(ptr, *i); /* found a match. Overwrite with this case. */
-            PHYSFS_freeList(rc);
-            return 1;
-        } /* if */
-    } /* for */
+            if (PHYSFS_utf8stricmp(*i, ptr) == 0)
+            {
+                strcpy(ptr, *i); /* found a match. Overwrite with this case. */
+                PHYSFS_freeList(rc);
+                return 1;
+            } /* if */
+        } /* for */
+
+        PHYSFS_freeList(rc);
+    } /* if */
 
     /* no match at all... */
-    PHYSFS_freeList(rc);
     return 0;
 } /* locateOneElement */