[ion] Storage: use strncmp instead of strcmp

When building with -fsanitize=address, strcmp is wrapped in a version
that returns only +1, -1 or 0.

ion/src/shared/storage.cpp

@@ -203,9 +203,7 @@ Storage::Record Storage::recordBaseNamedWithExtensions(const char * baseName, co
   size_t nameLength = strlen(baseName);
   for (char * p : *this) {
     const char * currentName = fullNameOfRecordStarting(p);
-    /* To not add the method strncmp, we use strcmp and compare to the expected
-     * result. */
-    if (strcmp(baseName, currentName) == 0 - currentName[nameLength]) {
+    if (strncmp(baseName, currentName, nameLength) == 0) {
       for (size_t i = 0; i < numberOfExtensions; i++) {
         if (strcmp(currentName+nameLength+1 /*+1 to pass the dot*/, extensions[i]) == 0) {
           return Record(currentName);