Fix implicit this in two places

Author: owen-mc

go/ql/lib/semmle/go/security/LogInjectionCustomizations.qll

@@ -69,7 +69,9 @@ module LogInjection {
      * Gets an argument to this call corresponding to a string that will be
      * replaced.
      */
-    DataFlow::Node getAReplacedArgument() { exists(int n | n % 2 = 0 and result = getArgument(n)) }
+    DataFlow::Node getAReplacedArgument() {
+      exists(int n | n % 2 = 0 and result = this.getArgument(n))
+    }
   }
 
   /**

go/ql/lib/semmle/go/security/StringBreakCustomizations.qll

@@ -116,7 +116,9 @@ module StringBreak {
      * Gets an argument to this call corresponding to a string that will be
      * replaced.
      */
-    DataFlow::Node getAReplacedArgument() { exists(int n | n % 2 = 0 and result = getArgument(n)) }
+    DataFlow::Node getAReplacedArgument() {
+      exists(int n | n % 2 = 0 and result = this.getArgument(n))
+    }
   }
 
   /**