Move must_alloc into test.h

src/test.h

@@ -127,6 +127,16 @@ test_main(int argc, const char **argv, struct testdef tests[])
     return allok ? 0 : 1;
 }
 
+static void *
+must_alloc(testctx t, size_t size)
+{
+    void *out = malloc(size);
+    if (out == NULL) {
+        test_fatalf(t, "Failed allocating %d bytes of memory", size);
+    }
+    return out;
+}
+
 #define TESTS_BEGIN                                       \
     int main(int argc, const char **argv)                 \
     {                                                     \

src/tokenizer_test.c

@@ -4,16 +4,6 @@
 
 #include "test.h"
 
-static void *
-must_alloc(testctx t, size_t size)
-{
-    void *out = malloc(size);
-    if (out == NULL) {
-        test_fatalf(t, "Failed allocating %d bytes of memory", size);
-    }
-    return out;
-}
-
 struct tokenizer_test {
     testctx t;
     apfl_tokenizer_ptr tokenizer;