Fix connect engine crashes in buildbot tests on Win64.

Do not truncate pointers returned by _findfirst to int.

storage/connect/tabmul.cpp

@@ -711,7 +711,7 @@ int TDBDIR::GetMaxSize(PGLOBAL g)
   if (MaxSize < 0) {
     int    n = -1;
 #if defined(__WIN__)
-    int    h;
+    intptr_t    h;
 
     // Start searching files in the target directory.
     h = _findfirst(Path(g), &FileData);
@@ -1007,7 +1007,7 @@ int TDBSDR::FindInDir(PGLOBAL g)
 
   // Start searching files in the target directory.
 #if defined(__WIN__)
-  int h = _findfirst(Path(g), &FileData);
+  intptr_t h = _findfirst(Path(g), &FileData);
 
   if (h != -1) {
     for (n = 1;; n++)

storage/connect/tabmul.h

@@ -134,7 +134,7 @@ class TDBDIR : public TDBASE {
   int  iFile;                   // Index of currently retrieved file
 #if defined(__WIN__)
   _finddata_t    FileData;      // Find data structure
-  int  Hsearch;                 // Search handle
+  intptr_t  Hsearch;            // Search handle
   char Drive[_MAX_DRIVE];       // Drive name
 #else   // !__WIN__
   struct stat    Fileinfo;      // File info structure
@@ -184,7 +184,7 @@ class TDBSDR : public TDBDIR {
     struct _Sub_Dir *Next;
     struct _Sub_Dir *Prev;
 #if defined(__WIN__)
-    int H;               // Search handle
+    intptr_t H;            // Search handle
 #else   // !__WIN__
     DIR *D;
 #endif  // !__WIN__