setupapi: Correctly report errors in fake_dlls_callback (Coverity)

[Frédéric Delanoy]

'ret'urn value was initially set to TRUE and never updated.

CID 1492
---
 dlls/setupapi/install.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/dlls/setupapi/install.c b/dlls/setupapi/install.c
index 947a512..d181969 100644
--- a/dlls/setupapi/install.c
+++ b/dlls/setupapi/install.c
@@ -713,10 +713,14 @@ static BOOL fake_dlls_callback( HINF hinf, PCWSTR field, void *arg )
         if (!(path = PARSER_get_dest_dir( &context ))) continue;
 
         /* get dll name */
-        if (!SetupGetStringFieldW( &context, 3, buffer, sizeof(buffer)/sizeof(WCHAR), NULL ))
+        if (!(ret = SetupGetStringFieldW( &context, 3, buffer, sizeof(buffer)/sizeof(WCHAR), NULL )))
             goto done;
         if (!(p = HeapReAlloc( GetProcessHeap(), 0, path,
-                               (strlenW(path) + strlenW(buffer) + 2) * sizeof(WCHAR) ))) goto done;
+                               (strlenW(path) + strlenW(buffer) + 2) * sizeof(WCHAR) )))
+        {
+            ret = FALSE;
+            goto done;
+        }
         path = p;
         p += strlenW(p);
         if (p == path || p[-1] != '\\') *p++ = '\\';
-- 
1.7.8.3