C++: Add test in C file with pointer type guard.

Author: MathiasVP

cpp/ql/test/library-tests/controlflow/guards/Guards.expected

@@ -26,6 +26,9 @@
 | test.c:137:7:137:7 | 0 |
 | test.c:146:7:146:8 | ! ... |
 | test.c:146:8:146:8 | x |
+| test.c:152:8:152:8 | p |
+| test.c:158:8:158:9 | ! ... |
+| test.c:158:9:158:9 | p |
 | test.cpp:18:8:18:10 | call to get |
 | test.cpp:31:7:31:13 | ... == ... |
 | test.cpp:42:13:42:20 | call to getABool |

cpp/ql/test/library-tests/controlflow/guards/GuardsControl.expected

@@ -79,6 +79,9 @@
 | test.c:137:7:137:7 | 0 | false | 142 | 136 |
 | test.c:146:7:146:8 | ! ... | true | 146 | 147 |
 | test.c:146:8:146:8 | x | false | 146 | 147 |
+| test.c:152:8:152:8 | p | true | 152 | 154 |
+| test.c:158:8:158:9 | ! ... | true | 158 | 160 |
+| test.c:158:9:158:9 | p | false | 158 | 160 |
 | test.cpp:18:8:18:10 | call to get | true | 19 | 19 |
 | test.cpp:31:7:31:13 | ... == ... | false | 30 | 30 |
 | test.cpp:31:7:31:13 | ... == ... | false | 34 | 34 |

cpp/ql/test/library-tests/controlflow/guards/test.c

@@ -147,3 +147,15 @@ void test5(int x) {
     test3();
   }
 }
+
+void test6(char* p) {
+    if(p) {
+
+    }
+}
+
+void test7(char* p) {
+    if(!p) {
+        
+    }
+}