Use short-circuit && in Exchange.removeKeyRangeInternal (CodeQL java/non-short-circuit-evaluation) (#245)

The anti-value guard combined removeOnlyAntiValue with the isKeyRangeAntiValue
check using the non-short-circuit & operator, so isKeyRangeAntiValue was always
evaluated even when removeOnlyAntiValue was false. isKeyRangeAntiValue only reads
buffer state and has no side effects, so switching to && is behaviour-preserving
and skips the redundant call when the flag is already false.

Author: vharseko

persistit/core/src/main/java/com/persistit/Exchange.java

@@ -3700,7 +3700,7 @@ boolean raw_removeKeyRangeInternal(final Key key1, final Key key2, final boolean
 
           LevelCache lc = _levelCache[0];
           if (removeOnlyAntiValue
-            & !isKeyRangeAntiValue(lc._leftBuffer, lc._leftFoundAt, lc._rightBuffer, lc._rightFoundAt)) {
+            && !isKeyRangeAntiValue(lc._leftBuffer, lc._leftFoundAt, lc._rightBuffer, lc._rightFoundAt)) {
             result = false;
             break;
           }