Generic/InlineControlStructure: fix error when handling else if

This commit fixes a bug in this sniff where it would not handle
correctly `else if` statements when there is a comment between the
`else` and `if` tokens.

The affected code was added in
squizlabs/PHP_CodeSniffer@18f98cc
to fix a similar bug when there is more than one whitespace between `else`
and `if`, but it failed to consider that there might be comment tokens
between `else` and `if`.

src/Standards/Generic/Sniffs/ControlStructures/InlineControlStructureSniff.php

@@ -75,7 +75,7 @@ public function process(File $phpcsFile, $stackPtr)
 
         // Ignore the ELSE in ELSE IF. We'll process the IF part later.
         if ($tokens[$stackPtr]['code'] === T_ELSE) {
-            $next = $phpcsFile->findNext(T_WHITESPACE, ($stackPtr + 1), null, true);
+            $next = $phpcsFile->findNext(Tokens::$emptyTokens, ($stackPtr + 1), null, true);
             if ($tokens[$next]['code'] === T_IF) {
                 return;
             }

src/Standards/Generic/Tests/ControlStructures/InlineControlStructureUnitTest.1.inc

@@ -272,3 +272,7 @@ function testFinally()
         } finally {
         }
 }
+
+if ($something) {
+    echo 'hello';
+} else /* comment */ if ($somethingElse) echo 'hi';

src/Standards/Generic/Tests/ControlStructures/InlineControlStructureUnitTest.1.inc.fixed

@@ -307,3 +307,8 @@ function testFinally()
         }
     }
 }
+
+if ($something) {
+    echo 'hello';
+} else /* comment */ if ($somethingElse) { echo 'hi';
+}

src/Standards/Generic/Tests/ControlStructures/InlineControlStructureUnitTest.js

@@ -29,3 +29,7 @@ if ($("#myid").rotationDegrees()=='90')
 
 if ($("#myid").rotationDegrees()=='90')
     $foo = {'transform': 'rotate(90deg)'};
+
+if (something) {
+    alert('hello');
+} else /* comment */ if (somethingElse) alert('hi');

src/Standards/Generic/Tests/ControlStructures/InlineControlStructureUnitTest.js.fixed

@@ -37,3 +37,8 @@ if ($("#myid").rotationDegrees()=='90') {
 if ($("#myid").rotationDegrees()=='90') {
     $foo = {'transform': 'rotate(90deg)'};
 }
+
+if (something) {
+    alert('hello');
+} else /* comment */ if (somethingElse) { alert('hi');
+}

src/Standards/Generic/Tests/ControlStructures/InlineControlStructureUnitTest.php

@@ -78,6 +78,7 @@ public function getErrorList($testFile='')
                 242 => 1,
                 260 => 1,
                 269 => 1,
+                278 => 1,
             ];
 
         case 'InlineControlStructureUnitTest.js':
@@ -90,6 +91,7 @@ public function getErrorList($testFile='')
                 21 => 1,
                 27 => 1,
                 30 => 1,
+                35 => 1,
             ];
 
         default: