cmd: Only copy from existent string (Coverity)

[André Hentschel]

CID: 510
---
 programs/cmd/wcmdmain.c |   14 ++++++++------
 1 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/programs/cmd/wcmdmain.c b/programs/cmd/wcmdmain.c
index 67a524d..579a49c 100644
--- a/programs/cmd/wcmdmain.c
+++ b/programs/cmd/wcmdmain.c
@@ -1043,13 +1043,15 @@ void WCMD_run_program (WCHAR *command, int called) {
 
     /* Convert eg. ..\fred to include a directory by removing file part */
     GetFullPathNameW(param1, sizeof(pathtosearch)/sizeof(WCHAR), pathtosearch, NULL);
-    lastSlash = strrchrW(pathtosearch, '\\');
-    if (lastSlash && strchrW(lastSlash, '.') != NULL) extensionsupplied = TRUE;
-    strcpyW(stemofsearch, lastSlash+1);
+    if ((lastSlash = strrchrW(pathtosearch, '\\')))
+    {
+        if (strchrW(lastSlash, '.') != NULL) extensionsupplied = TRUE;
+        strcpyW(stemofsearch, lastSlash+1);
 
-    /* Reduce pathtosearch to a path with trailing '\' to support c:\a.bat and
-       c:\windows\a.bat syntax                                                 */
-    if (lastSlash) *(lastSlash + 1) = 0x00;
+        /* Reduce pathtosearch to a path with trailing '\' to support c:\a.bat and
+           c:\windows\a.bat syntax                                                 */
+        *(lastSlash + 1) = 0x00;
+    }
   }
 
   /* Now extract PATHEXT */
-- 

Best Regards, André Hentschel
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