GetDirectoryPath: return NULL, don't crash when no slash

Noted in #634.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/core.c b/src/core.c
index 81ca2f58..ce510406 100644
--- a/src/core.c
+++ b/src/core.c
@@ -1374,6 +1374,9 @@ const char *GetDirectoryPath(const char *fileName)
     memset(filePath, 0, 256);
 
     lastSlash = strprbrk(fileName, "\\/");
+    if (!lastSlash)
+        return NULL;
+
     strncpy(filePath, fileName, strlen(fileName) - (strlen(lastSlash) - 1));
     filePath[strlen(fileName) - strlen(lastSlash)] = '\0';