Fixed #1662 (false positive: Data is allocated but not initialized, when using sprintf)

lib/checkother.cpp

@@ -2965,7 +2965,7 @@ private:
                 for (std::list<const Token *>::const_iterator it = var2.begin(); it != var2.end(); ++it)
                 {
                     if (std::find(var.begin(), var.end(), *it) == var.end())
-                        use_pointer(checks, *it);
+                        use_dead_pointer(checks, *it);
                 }
             }
 

test/testother.cpp

@@ -2022,6 +2022,13 @@ private:
                        "}\n");
         ASSERT_EQUALS("[test.cpp:4]: (error) Uninitialized variable: p\n", errout.str());
 
+        checkUninitVar("void foo(const char *s)\n"
+                       "{\n"
+                       "    char *p = malloc(100);\n"
+                       "    memcpy(p, s, 100);\n"
+                       "}\n");
+        ASSERT_EQUALS("", errout.str());
+
         // using uninitialized function pointer..
         checkUninitVar("void foo()\n"
                        "{\n"