[LyX/master] Fix #10862 compiler warnings.

[Richard Heck]

commit b1adf98037faadb4fe0096efad302350fd5e5359
Author: Richard Heck <rgh...@lyx.org>
Date:   Fri Dec 15 23:47:20 2017 -0500

    Fix #10862 compiler warnings.
---
 src/mathed/MathExtern.cpp |   14 +++++++-------
 1 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/src/mathed/MathExtern.cpp b/src/mathed/MathExtern.cpp
index 52fa0cf..323ea13 100644
--- a/src/mathed/MathExtern.cpp
+++ b/src/mathed/MathExtern.cpp
@@ -775,17 +775,17 @@ void extractSums(MathData & ar)
                InsetMathScript const * sub = ar[i]->asScriptInset();
                if (sub && sub->hasDown()) {
                        // try to figure out the summation index from the 
subscript
-                       MathData const & ar = sub->down();
+                       MathData const & md = sub->down();
                        MathData::const_iterator xt =
-                               find_if(ar.begin(), ar.end(), &testEqualSign);
-                       if (xt != ar.end()) {
+                               find_if(md.begin(), md.end(), &testEqualSign);
+                       if (xt != md.end()) {
                                // we found a '=', use everything in front of 
that as index,
                                // and everything behind as lower index
-                               p->cell(1) = MathData(buf, ar.begin(), xt);
-                               p->cell(2) = MathData(buf, xt + 1, ar.end());
+                               p->cell(1) = MathData(buf, md.begin(), xt);
+                               p->cell(2) = MathData(buf, xt + 1, md.end());
                        } else {
                                // use everything as summation index, don't use 
scripts.
-                               p->cell(1) = ar;
+                               p->cell(1) = md;
                        }
                }
 
@@ -900,7 +900,7 @@ void extractDiff(MathData & ar)
                                                lyxerr << "Cannot differentiate 
less than 0 or more than 1000 times !" << endl;
                                                continue;
                                        }
-                                       for (int i = 0; i < mult; ++i)
+                                       for (int ii = 0; ii < mult; ++ii)
                                                diff->addDer(MathData(buf, dt + 
1, st));
                                }
                        } else {