[PATCH] odbccp32: Avoid using RegQueryInfoKey() in SQLGetInstalledDrivers().

[Zebediah Figura]

Signed-off-by: Zebediah Figura 
---
 dlls/odbccp32/odbccp32.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/dlls/odbccp32/odbccp32.c b/dlls/odbccp32/odbccp32.c
index 8788330..515d44c 100644
--- a/dlls/odbccp32/odbccp32.c
+++ b/dlls/odbccp32/odbccp32.c
@@ -510,8 +510,8 @@ BOOL WINAPI SQLGetInstalledDriversW(WCHAR *buf, WORD size, WORD *sizeout)
         return FALSE;
     }

-    RegQueryInfoKeyW(drivers, 0, 0, 0, 0, 0, 0, 0, &valuelen, 0, 0, 0);
-    value = heap_alloc(++valuelen * sizeof(WCHAR));
+    valuelen = 256;
+    value = heap_alloc(valuelen * sizeof(WCHAR));

size--;

@@ -519,6 +519,11 @@ BOOL WINAPI SQLGetInstalledDriversW(WCHAR *buf, WORD size, WORD *sizeout)
     {
         len = valuelen;
         res = RegEnumValueW(drivers, index++, value, &len, NULL, NULL, NULL, NULL);
+        if (res == ERROR_MORE_DATA)
+        {
+            value = heap_realloc(value, ++len * sizeof(WCHAR));
+            res = RegEnumValueW(drivers, index++, value, &len, NULL, NULL, NULL, NULL);
+        }
         if (res == ERROR_SUCCESS)
         {
             lstrcpynW(buf + written, value, size - written);