[tfaber] 71097: [KERNEL32] - Correctly calculate the buffer size if the PATH variable is set but empty in BasepComputeProcessPath. Yes, this is a bug in Windows. CORE-11080 #resolve

Author: tfaber
Date: Sun Apr  3 20:48:51 2016
New Revision: 71097

URL: http://svn.reactos.org/svn/reactos?rev=71097&view=rev
Log:
[KERNEL32]
- Correctly calculate the buffer size if the PATH variable is set but empty in
BasepComputeProcessPath. Yes, this is a bug in Windows.
CORE-11080 #resolve

Modified:
    trunk/reactos/dll/win32/kernel32/client/path.c

Modified: trunk/reactos/dll/win32/kernel32/client/path.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/client/…
==============================================================================
--- trunk/reactos/dll/win32/kernel32/client/path.c	[iso-8859-1] (original)
+++ trunk/reactos/dll/win32/kernel32/client/path.c	[iso-8859-1] Sun Apr  3 20:48:51 2016
@@ -210,9 +210,13 @@
             }
             else
             {
-                /* Add the length of the PATH variable */
+                /* Add the length of the PATH variable unless it's empty */
                 ASSERT(!(EnvPath.Length & 1));
-                PathLengthInBytes += (EnvPath.Length + sizeof(L';'));
+                if (EnvPath.Length)
+                {
+                    /* Reserve space for the variable and a semicolon */
+                    PathLengthInBytes += (EnvPath.Length + sizeof(L';'));
+                }
             }
             break;