user32: Use boolean return values in boolean functions.

dlls/user32/input.c

@@ -266,7 +266,7 @@ BOOL WINAPI GetCursorInfo( PCURSORINFO pci )
 {
     BOOL ret;
 
-    if (!pci) return 0;
+    if (!pci) return FALSE;
 
     SERVER_START_REQ( get_thread_input )
     {

dlls/user32/nonclient.c

@@ -360,7 +360,7 @@ BOOL WINAPI DrawCaptionTempW (HWND hwnd, HDC hdc, const RECT *rect, HFONT hFont,
     if (uFlags & 0x2000)
         FIXME("undocumented flag (0x2000)!\n");
 
-    return 0;
+    return FALSE;
 }
 
 

dlls/user32/painting.c

@@ -486,7 +486,7 @@ static BOOL CALLBACK dc_hook( HDC hDC, WORD code, DWORD_PTR data, LPARAM lParam
 
     TRACE("hDC = %p, %u\n", hDC, code);
 
-    if (!dce) return 0;
+    if (!dce) return FALSE;
     assert( dce->hdc == hDC );
 
     switch( code )