[Static Analyzer] Fixed a typo in a diagnostic message.

llvm-svn: 247444
diff --git a/clang/lib/StaticAnalyzer/Checkers/NullabilityChecker.cpp b/clang/lib/StaticAnalyzer/Checkers/NullabilityChecker.cpp
index a46d23d..c44a5e6 100644
--- a/clang/lib/StaticAnalyzer/Checkers/NullabilityChecker.cpp
+++ b/clang/lib/StaticAnalyzer/Checkers/NullabilityChecker.cpp
@@ -99,7 +99,7 @@
     "Nullable pointer is returned from a function that is expected to return a "
     "non-null value",
     "Nullable pointer is dereferenced",
-    "Nullable pointer is passed to a calle that requires a non-null argument"};
+    "Nullable pointer is passed to a callee that requires a non-null argument"};
 
 class NullabilityChecker
     : public Checker<check::Bind, check::PreCall, check::PreStmt<ReturnStmt>,