Fix #14707 Clarify: uninitMemberVarNoCtor variable (#8556)

Co-authored-by: chrchr-github <noreply@github.com>

Author: chrchr-github

lib/checkclass.cpp

@@ -372,7 +372,7 @@ void CheckClass::constructors()
 
                 const Variable& var = *usage.var;
                 if (diagVars.count(&var) == 0)
-                    uninitVarError(scope->bodyStart, false, FunctionType::eConstructor, var.scope()->className, var.name(), false, false, true);
+                    uninitVarError(var.nameToken(), false, FunctionType::eConstructor, var.scope()->className, var.name(), false, false, true);
             }
         }
     }

test/testconstructors.cpp

@@ -763,7 +763,7 @@ class TestConstructors : public TestFixture {
         check("struct S {\n" // #14546
               "    int a = 0, b;\n"
               "};\n");
-        ASSERT_EQUALS("[test.cpp:1:10]: (warning) Member variable 'S::b' has no initializer. [uninitMemberVarNoCtor]\n", errout_str());
+        ASSERT_EQUALS("[test.cpp:2:16]: (warning) Member variable 'S::b' has no initializer. [uninitMemberVarNoCtor]\n", errout_str());
 
         check("struct S {\n"
               "    int a, b;\n"