ICU 56 step 4: Apply post-56 fixes for measure/date format

source/i18n/measunit.cpp

Index: source/i18n/measunit.cpp
diff --git a/source/i18n/measunit.cpp b/source/i18n/measunit.cpp
index 35a56df5d7a586821c9f03452014ca7ca077e73c..40b954755567067a663edcf43457bed472a1ce81 100644
--- a/source/i18n/measunit.cpp
+++ b/source/i18n/measunit.cpp
@@ -1152,6 +1152,18 @@ int32_t MeasureUnit::getIndexCount() {
     return gIndexes[UPRV_LENGTHOF(gIndexes) - 1];
 }
 
+int32_t MeasureUnit::internalGetIndexForTypeAndSubtype(const char *type, const char *subtype) {
+    int32_t t = binarySearch(gTypes, 0, UPRV_LENGTHOF(gTypes), type);
+    if (t < 0) {
+        return t;
+    }
+    int32_t st = binarySearch(gSubTypes, gOffsets[t], gOffsets[t + 1], subtype);
+    if (st < 0) {
+        return st;
+    }
+    return gIndexes[t] + st - gOffsets[t];
+}
+
 MeasureUnit *MeasureUnit::resolveUnitPerUnit(
         const MeasureUnit &unit, const MeasureUnit &perUnit) {
     int32_t unitOffset = unit.getOffset();