[BUGFIX] Warning in Install Tool if APC is installed but not enabled

Resolves: #53748
Releases: 6.2
Change-Id: I22a2b60871639075dc108946bbaeae3730fc7085
Reviewed-on: https://review.typo3.org/25493
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters

typo3/sysext/install/Classes/Configuration/ExtbaseObjectCache/ApcPreset.php

@@ -59,7 +59,7 @@ class ApcPreset extends Configuration\AbstractPreset {
 	public function isAvailable() {
 		$result = FALSE;
 		if (extension_loaded('apc')) {
-			$memoryInfo = apc_sma_info();
+			$memoryInfo = @apc_sma_info();
 			$totalMemory = $memoryInfo['num_seg'] * $memoryInfo['seg_size'];
 			$availableMemory = $memoryInfo['avail_mem'];