Fixed #2185 (False negative: when constant is undefined a 'dangerous usage of strncpy' is not found)

lib/checkuninitvar.cpp

@@ -427,7 +427,8 @@ private:
             }
 
             // Variable declaration for array..
-            if (Token::Match(vartok, "%type% %var% [ %num% ] ;"))
+            if (Token::Match(vartok, "%type% %var% [") &&
+                Token::simpleMatch(vartok->tokAt(2)->link(), "] ;"))
             {
                 vartok = vartok->next();
                 declare(checks, vartok, tok, false, true);

test/testuninitvar.cpp

@@ -806,6 +806,13 @@ private:
                        "}\n");
         ASSERT_EQUALS("[test.cpp:4]: (error) Uninitialized variable: a\n", errout.str());
 
+        checkUninitVar("int f()\n"
+                       "{\n"
+                       "    char a[SIZE+10];\n"
+                       "    char c = *a;\n"
+                       "}\n");
+        ASSERT_EQUALS("[test.cpp:4]: (error) Uninitialized variable: a\n", errout.str());
+
         checkUninitVar("int f()\n"
                        "{\n"
                        "    char a[10];\n"