Fix several warnings about uninitialized variables from gcov build

modules/legacy/src/epilines.cpp

@@ -1826,7 +1826,7 @@ void icvGetCutPiece(   CvVect64d areaLineCoef1,CvVect64d areaLineCoef2,
     /* Collect all candidate point */
 
     CvPoint2D64d candPoints[8];
-    CvPoint2D64d midPoint;
+    CvPoint2D64d midPoint = {0, 0};
     int numPoints = 0;
     int res;
     int i;

modules/legacy/src/lmeds.cpp

@@ -1615,7 +1615,7 @@ CvStatus
 icvPoint7( int *ml, int *mr, double *F, int *amount )
 {
     double A[63], B[7];
-    double *solutions;
+    double *solutions = 0;
     double a2, a1, a0;
     double squares[6];
     int i, j;

modules/legacy/src/scanlines.cpp

@@ -1125,7 +1125,7 @@ icvBuildScanlineLeft( CvMatrix3 * matrix,
     CvMatrix3 *F;
     float i;
     int offset;
-    float epiline[3];
+    float epiline[3] = {0,};
     double a, b;
 
     assert( l_start_end != 0 );
@@ -1211,7 +1211,7 @@ icvBuildScanlineRight( CvMatrix3 * matrix,
     CvMatrix3 *F;
     float i;
     int offset;
-    float epiline[3];
+    float epiline[3] = {0,};
     double a, b;
 
     assert( r_start_end != 0 );
@@ -1389,7 +1389,9 @@ icvGetCoefficientStereo( CvMatrix3 * matrix,
     float l_angle[2], r_angle[2];
     float l_radius, r_radius;
     float r_point[3], l_point[3];
-    float l_epiline[3], r_epiline[3], x, y;
+    float l_epiline[3] = {0,};
+    float r_epiline[3] = {0,};
+    float x, y;
     float swap;
 
     float radius1, radius2, radius3, radius4;
@@ -1731,8 +1733,8 @@ icvBuildScanlineLeftStereo( CvSize imgSize,
     float delta;
     float angle;
     float l_point[3];
-    float l_epiline[3];
-    float r_epiline[3];
+    float l_epiline[3] = {0,};
+    float r_epiline[3] = {0,};
     CvStatus error = CV_OK;
     CvMatrix3 *F;
 
@@ -1819,8 +1821,8 @@ icvBuildScanlineRightStereo( CvSize imgSize,
     float delta;
     float angle;
     float r_point[3];
-    float l_epiline[3];
-    float r_epiline[3];
+    float l_epiline[3] = {0,};
+    float r_epiline[3] = {0,};
     CvStatus error = CV_OK;
     CvMatrix3 *F;