Fix crashing test on several Debian based CI runners

The crash happens due to a undersized char array where one writes after the
upper bound when the file path is to long. The problem occurred in the CI
pipeline for some users with very long user names.

The quick fix is to enlarge the charcter arrays but on the long term the char
arrays should be replaced by strings.

macro/geometry/examine_materials.C

@@ -24,7 +24,7 @@ typedef struct MAT_VOL mat_vol_t;
 
 struct MAT_VOL {
   int count;  // Number of volumes
-  char name[100];
+  char name[200];
 };
 
 int REG_MATERIALS = 0;  // counter for the currently number of registered materials.
@@ -65,7 +65,7 @@ int extract_mat_vol(char* fileName, mat_vol_t* material_array)
 
   file.GetListOfKeys()->Print();
   file.GetSize();
-  char geo_tag[100];
+  char geo_tag[300];
   strcpy(geo_tag, fileName);
   char* ptr = strstr(geo_tag, ".geo.root");
   *(ptr)    = '\0';
@@ -159,7 +159,7 @@ int examine_materials(const char* setup = "sis100_electron")
   printf("\n");
 
   TString fileName;
-  char fileNameC[100];
+  char fileNameC[300];
   CbmSetup* cs                  = run.GetSetup();
   mat_vol_t* detector_materials = (mat_vol_t*) malloc(sizeof(mat_vol_t) * 500);
   for (int i = 0; i < MAX_MATERIALS; i++) {